Daily Work Organizer Tuesday Question of the Day: How do we know how far stars are from earth? Do Now: Is your intelligence something very basic about you that you can’t really change? Why or why not? Agenda: Introduction to Light Cornell notes Homework Homework: Finish Cornell Notes Homework: Finish Cornell Notes Put your HW next to your DWO. Remember to pick up your graded work from the box!

Readers Theatre Excerpt from: The secret to raising smart kids 1.Read the paragraph out loud together 2.Read every other line and switch F(partner 1 will read the first line, and partner 2 will read the second) 3.When you get to the end of the paragraph, start again! Try using funny accents! 1.Read the paragraph out loud together 2.Read every other line and switch F(partner 1 will read the first line, and partner 2 will read the second) 3.When you get to the end of the paragraph, start again! Try using funny accents!

It’s what we see…

Light Speed light around the earth 300,000,000 m/s 3 x 10 8 m/s light around the earth 300,000,000 m/s 3 x 10 8 m/s

Light Speed Just over a second from the moon

Light Speed 8 minutes from the sun

Light Speed 4.2 years from Alpha Centauri! (second nearest star)

Lightyear 170, 000 lightyears away How many years ago did it occur? 170, 000 lightyears away How many years ago did it occur? How far light travels in 1 year

Refraction the bending of light when passing through a new (transparent) substance

Plane Mirrors: The Flat Mirrors

Plane Mirrors Incident ray hits the mirror Reflected ray is the ray that bounces off The Normal is the perpendicular line from mirror Incident ray hits the mirror Reflected ray is the ray that bounces off The Normal is the perpendicular line from mirror

Parallax real screw (behind mirror) image of screw mirror Parallax can be used to find image location Parallax makes objects appear to move when not in the same place Try it

Parallax

Move head to the side If the image and real screw separate, then not at same place Try it mirror

Parallax If the two move together, they are at same place Try it mirror

How do scientists calculate the distance between Earth and some other star?

Remember to pick up your graded work from the box!

Now, to the Lab Part I (pg 6)

Daily Work Organizer Monday Question of the Day: Do Now: Draw a ray of light that strikes a mirror at an angle of 30° from the mirror Agenda: Cornell notes Homework Homework: Finish Cornell Notes Reading Log for pg 23 Homework: Finish Cornell Notes Reading Log for pg 23 Draw, measure, and label the: Normal, Incident & reflective angles. Bonus: How could you calculate the Incident & Reflective angles without drawing anything?

Homework problems: pg Due on Wednesday/Thursday Every Scholar: Problems 1, 2, 3 Honors physics: above problems plus 4 Due Friday Every Scholar: Problems 6, 7, 10 Honors physics: above problems plus 8, 9 Due on Wednesday/Thursday Every Scholar: Problems 1, 2, 3 Honors physics: above problems plus 4 Due Friday Every Scholar: Problems 6, 7, 10 Honors physics: above problems plus 8, 9 Extra Credit: problem 5 & any Honors problems Extra Credit: problem 5 & any Honors problems

Lab 1 (pg 6-11) Due Today by 3:45pm to room 308 Also: Several scholars forgot to write their names on their labs... TURN IN DAILY WORK ORGANIZERS! Also: Several scholars forgot to write their names on their labs... TURN IN DAILY WORK ORGANIZERS!

Jobs FWhiteboard eraser FPowerpoint master F2 students to Handback assignments FSalary: 1 ticket per day FWhiteboard eraser FPowerpoint master F2 students to Handback assignments FSalary: 1 ticket per day

Challenge Problems FDo Challenge problems when you are done with classwork FExcellent chance to review material that will be on the test! FLater on it will become an excellent opportunity to review old material that will be on the final FTurn in completed worksheets to the folder and receive 3 tickets FDo Challenge problems when you are done with classwork FExcellent chance to review material that will be on the test! FLater on it will become an excellent opportunity to review old material that will be on the final FTurn in completed worksheets to the folder and receive 3 tickets

Upcoming events F1 st physics problem set due soon! Advice: Work with friends Start NOW (Do not wait till last minute) Ask for help! FBinder quiz F1 st quiz on Friday F1 st physics problem set due soon! Advice: Work with friends Start NOW (Do not wait till last minute) Ask for help! FBinder quiz F1 st quiz on Friday

Vocab WordPicture that reminds you of definition DefinitionWord or words that remind you of definition Sentence using word Incidence The intersection of light with a surface Intersection mirror Incidence Angle Whenever light strikes a surface, the angle of incidence is equal to the angle of reflection.

Vocab WordPicture that reminds you of definition DefinitionWord or words that remind you of definition Sentence using word Reflection An amount of light, heat or sound that is thrown back Throwing back, bouncing off, mirror Reflected Angle Both Edward Cullen and Dracula cannot see their reflections in the mirror. How do they style their hair?

Vocab WordPicture that reminds you of definition DefinitionWord or words that remind you of definition Sentence using word Normal A perpendicular (90 ° ) intersection of a line or surface Perpendicular, right angle, 90° mirror normal The line normal to the mirror is 90° from the mirror. The normal is between the incident and reflected rays.

Reflection Virtual Image of the nose

2 Laws of Reflection F  i =  r Object distanc e = Image distance F d i to mirror) = d o (to mirror)

Image Formation

Diffuse Reflectors

What is a summery? FINCLUDES ALL MAIN POINTS! FA paragraph written in full sentences. FINCLUDES ALL MAIN POINTS! FA paragraph written in full sentences. Example: The angle of incidence is equal to the angle of Reflection. The Normal is an imaginary line drawn 90 degrees to the mirror and is an equal number of degrees from both the incident and reflected rays.

Daily Work Organizer Monday Question of the Day: Do Now: Complete Reflection worksheet #1 Agenda: Homework Questions Vocab Reflection Worksheet Lab Grades Homework Homework: Problems 1, 2, 3 Honors: + 4 Homework: Problems 1, 2, 3 Honors: + 4 When done: Start on Worksheet #2 or #3

Find the Object

Let’s try it turn to pg 15

Find the Object Image to eye 14.5 cm Object 14.5 cm Apparent path of light Actual path of light

Yourself in a Mirror FMinimum height of mirror?

Tip for #4 FWork backwards! Where do the rays need to reach to let everything be seen? Tip for #6 FIn order to focus you camera you must know the distance between the camera and the image

Class Points aka: Tickets for everyone! F100% homework completion FEveryone is in their seats, silently doing the Do Now when the bell rings F100% homework completion FEveryone is in their seats, silently doing the Do Now when the bell rings

Vocab WordPicture that reminds you of definition DefinitionWord or words that remind you of definition Sentence using word Parallel Parallel lines always have the same distance between them Parallel of latitude Never crossing 并行 (?) Parallel of latitude Never crossing 并行 (?) Parallel lines Parallel lines will never cross

Black Holes The mass inside a black hole is infinitely large.

Vocab WordPicture that reminds you of definition DefinitionWord or words that remind you of definition Sentence using word Infinite 无限 Infinite 无限 Limitless or endless. Impossible to measure or calculate Black Holes! Larger than the largest number The mass inside a black hole is infinitely large. The number closest to 0 that is not 0 is infinitely small ∞ ∞

Vocab WordPicture that reminds you of definition DefinitionWord or words that remind you of definition Sentence using word Image An optical appearance produced by light. Light rays Not always behind a mirror or lens Light rays Not always behind a mirror or lens Interesting fact: the image is not always BEHIND the mirror!

Vocab WordPicture that reminds you of definition DefinitionWord or words that remind you of definition Sentence using word Object The physical object that produces an image Examples: ME when I look in the mirror! When Bella looks into the mirror she is the object. Her reflection is the image.

Reflection Lab Grades FTotal possible points: 50 FExamples -2 on the front means you earned 48 / 50 points or 96% -10 on the front means you earned 40 / 50 points or 80% FTotal possible points: 50 FExamples -2 on the front means you earned 48 / 50 points or 96% -10 on the front means you earned 40 / 50 points or 80%

Common Shortfalls =( FNo Full Sentences Ex: FExample of a great response: FNo Full Sentences Ex: FExample of a great response: 4.2cm and 4.5 cm. 5% The distance from the object to the mirror is 7.7cm and the distance from the mirror to the image is 7.6cm. The percent difference is 1.3% which indicates that these distances are very close. What is 4.2cm???

Common Shortfalls =( FNot labeling the Image in Part 1 Step 9 of the procedure says: Label the image If you want to discuss lab grades: 1.Write a note. Staple it to the lab and turn it into the re-grade folder 2.Talk to me after school in room 308

Lab Corrections FDue 1 week from the day it was due (MONDAY  Tuesday) FCorrect your lab and staple a note to the front telling me: 1.what you corrected 2.your original mistake FDue 1 week from the day it was due (MONDAY  Tuesday) FCorrect your lab and staple a note to the front telling me: 1.what you corrected 2.your original mistake NOTE: You can not earn points back by labeling the image…

1 st Quiz on Friday! FBe prepared! What will the quiz cover? o Worksheets from class o Homework o Vocabulary FBe prepared! What will the quiz cover? o Worksheets from class o Homework o Vocabulary

Daily Work Organizer Wednesday Question of the Day:Do Now: Continue to work on Reflection Worksheets If you finish: Challenge Problems! =) Agenda: Homework review Curved mirrors (42) Homework Fridays Homework: Corrections to first problem set Problems 6, 7, 8 Honors: + 9, 10 Fridays Homework: Corrections to first problem set Problems 6, 7, 8 Honors: + 9, 10

Problem 1 What happens to the surface of the road when it is wet? Why ? Water fills in crevices (bumps) creating a smooth surface for light to reflect upon

Reflection on a smooth surface

Headlight on a dry road

Vocab WordPicture that reminds you of definition DefinitionWord or words that remind you of definition Sentence using word Image An optical appearance produced by light. Light rays Not always behind a mirror or lens Light rays Not always behind a mirror or lens Interesting fact: the image is not always BEHIND the mirror!

Vocab WordPicture that reminds you of definition DefinitionWord or words that remind you of definition Sentence using word Object The physical object that produces an image Examples: ME when I look in the mirror! When you look into the mirror you are the object. Your reflection is the image.

Vocab WordPicture that reminds you of definition DefinitionWord or words that remind you of definition Sentence using word Converge Come together from different directions to eventually meet Come together Cross Eventually meet Come together Cross Eventually meet The students will converge in the cafeteria

Vocab WordPicture that reminds you of definition DefinitionWord or words that remind you of definition Sentence using word Diverge Separate and go in different directions Separate Grow apart Turn away Separate Grow apart Turn away Monkeys and Humans diverged from a common ancestor

Daily Work Organizer Friday Question of the Day: Do Now: A man is standing between 2 parallel mirrors and facing left. Agenda: Homework review Quiz Homework Tuesday’s Homework: Page Extra Credit: pg 20 Tuesday’s Homework: Page Extra Credit: pg 20 mirror 2.0 m 1.0 m

If you did any extra credit problems 1.Write your name on the homework 2.Staple your homework 3.Turn it in TODAY 1.Write your name on the homework 2.Staple your homework 3.Turn it in TODAY

Do Now mirror object mirror 3.0 m 2.0 m 1.0 m A man is standing between 2 parallel mirrors looking to the left. How far away from the person are the first three images he sees?

Problem 6 mirror 2.0 m 4.5 m object image

Problem 7: 25° with the surface of the mirror… ? Mirror 25° normal θ θ = incident angle 90° = θ + 25° 90° – 25° = θ 65° = θ But what is the question is asking?

Reflection problem 10 Virtual Image of the nose

Daily Work Organizer Tuesday Question of the Day:Do Now: Agenda: Cornell notes Last week’s quiz Discuss Activity pg Lab demo Homework Homework: Read Lab 2 (34-35) Turn in Activity pgs Pre-Lab (honors) Homework: Read Lab 2 (34-35) Turn in Activity pgs Pre-Lab (honors)

Curved Mirrors

Curved Mirror Vocab FC = center of curvature Fradius of curvature  f = focal point - rays converge FF = focal length Ff = C / 2 FC = center of curvature Fradius of curvature  f = focal point - rays converge FF = focal length Ff = C / 2 C f

Vocab WordPicture that reminds you of definition DefinitionWord or words that remind you of definition Sentence using word Center of Curvature Center of sphere The center of curvature of a 10 meter sphere is 5 meters Radius of the sphere the mirror was made from

Vocab WordPicture that reminds you of definition DefinitionWord or words that remind you of definition Sentence using word Focal Point Where rays cross “ “ come together “ “ intersect Where rays cross “ “ come together “ “ intersect Every ray crosses the focal point Point at which rays converge (come together) f

Do Now: 4 problems 1.Where is the center of curvature of a 12 inch basketball? 2.A curved mirror has a center of curvature of 16 cm. What is the focal length? 1.Where is the center of curvature of a 12 inch basketball? 2.A curved mirror has a center of curvature of 16 cm. What is the focal length? 1. The center of curvature is the center of the basketball = 6 inches radially inwards 2. The focal length is ½ the center of curvature = 8cm 1. The center of curvature is the center of the basketball = 6 inches radially inwards 2. The focal length is ½ the center of curvature = 8cm

What is the center of curvature of a golden globe award? (the diameter of the globe is 10 cm) The center of curvature is the center of the sphere 5 cm The center of curvature is the center of the sphere 5 cm

What is the focal length of the death star laser if the radius of the laser dish is 120m? The focal length is ½ the center of curvature = 60 meters The focal length is ½ the center of curvature = 60 meters

Homework problems: pg 28 Due on Wednesday/Thursday Every Scholar: FRead Lab 2 (pg 34-35) FActivity pages Honors physics: Above plus Pre-lab Due Friday Every Scholar: Lab 2 (pgs 34-37) Extra credit mini project on page 20 Due on Wednesday/Thursday Every Scholar: FRead Lab 2 (pg 34-35) FActivity pages Honors physics: Above plus Pre-lab Due Friday Every Scholar: Lab 2 (pgs 34-37) Extra credit mini project on page 20 Extra Credit: Eye chart mini project pg 20 Extra Credit: Eye chart mini project pg 20

Jobs FWhiteboard eraser FPowerpoint master F2 students to Handback assignments FSalary: 1 ticket per day FWhiteboard eraser FPowerpoint master F2 students to Handback assignments FSalary: 1 ticket per day

BoBA Binder of Brilliant Answers FBoBA can be found in room 308 FExcellent way to check your HW answers FMake sure you’re studying the right answers before tests & quizzes FBoBA can be found in room 308 FExcellent way to check your HW answers FMake sure you’re studying the right answers before tests & quizzes

Class Goal! 85%

Class Goal! 80%

QUIZ! 1° Class Average: 85% 2° Class Average: 74% 3° Class Average: 65.3% 4° Class Average: 73.8% 6° Class Average: 70.3% 1° Class Average: 85% 2° Class Average: 74% 3° Class Average: 65.3% 4° Class Average: 73.8% 6° Class Average: 70.3%

Quiz Retakes Friday at lunch, 12:25pm or after school at 3:25pm, Room 308 No late entry permitted Option 1: Turn in your corrected 1 st quiz and receive the higher of your two scores Option 2: Retake the quiz and receive the average of your two scores Friday at lunch, 12:25pm or after school at 3:25pm, Room 308 No late entry permitted Option 1: Turn in your corrected 1 st quiz and receive the higher of your two scores Option 2: Retake the quiz and receive the average of your two scores

Questions about homework or quizzes? Room 308 Tuesday 3:10 Thursday 3:10 Room 308 Tuesday 3:10 Thursday 3:10

Question 6 (2 points) Incident ray hits the mirror Reflected ray is the ray that bounces off The Normal is the perpendicular line from mirror Incident ray hits the mirror Reflected ray is the ray that bounces off The Normal is the perpendicular line from mirror

Apparent path Actual path Object Question 7 (3 points)

Activity pg FDue on Wednesday / Thursday FWill be graded FIgnore /skip question 3 on page 27 FDue on Wednesday / Thursday FWill be graded FIgnore /skip question 3 on page 27

Pg 25 Your ray diagram should look something like this:

Pg 25 1.What is the orientation of the rays after being reflected from the mirrors surface? The reflected rays diverge. The rays will never intersect (cross) because they are diverging The reflected rays diverge. The rays will never intersect (cross) because they are diverging

Pg How does the focal length compare to the center of curvature? The focal length is ½ the center of curvature

Pg If you had a 10 cm Christmas tree bulb that was 10 cm in diameter, what would it’s focal length be? The focal length is ½ the center of curvature = 5 cm

Pg 27 Your ray diagram should look something like this:

Question 5, pg 28 Draw tangent lines

Do Now: Solve for x 1.x/6 = 1/3 2.x/8 = 1/2 + 1/4 3.x/(d o d i )= 1/d o + 1/d i 4.1/x = 1/d o + 1/d i 1.x/6 = 1/3 2.x/8 = 1/2 + 1/4 3.x/(d o d i )= 1/d o + 1/d i 4.1/x = 1/d o + 1/d i 1.X = 2 2.X = 6 3.X = d o + d i 4.X = d o d i / (d o + d i ) 1.X = 2 2.X = 6 3.X = d o + d i 4.X = d o d i / (d o + d i )

Vocab WordPicture that reminds you of definition DefinitionWord or words that remind you of definition Sentence using word Real Image Image in front of mirror Only created by concave mirrors Image in front of mirror Only created by concave mirrors Movie theatre projectors create real images on the big screen. Occur when light rays from an object reflect from a mirror and converge

Vocab WordPicture that reminds you of definition DefinitionWord or words that remind you of definition Sentence using word Virtual Image Occur when light rays from an object reflect off a mirror and diverge Virtual images are behind the mirror My reflection in a plane mirror is a virtual image because the reflected rays converge behind the mirror 2.0 m object 2.0 m image

Lab 2!

How do you calculate the focal length of a curved mirror? 1/f =1/d o +1/d i 1/Focal length = 1/object distance + 1/image distance 1/f =1/d o +1/d i 1/Focal length = 1/object distance + 1/image distance f = d o d i / (d o + d i )

Note FIgnore question 2 on page 37 FIgnore the bottom row discussing convex mirror data on page 38 We will talk about convex mirrors in class on Friday FIgnore question 2 on page 37 FIgnore the bottom row discussing convex mirror data on page 38 We will talk about convex mirrors in class on Friday

Your data table FImage Size; either larger, smaller, or same. FImage Orientation; either upright or inverted. FImage Position; either behind mirror (distance will be negative), between mirror and object, at object, or beyond object FImage Size; either larger, smaller, or same. FImage Orientation; either upright or inverted. FImage Position; either behind mirror (distance will be negative), between mirror and object, at object, or beyond object

Advice FMark & number all 11 object and image distances on your paper FRecord the object size, orientation & location of each image (skip recording the object and image distances, you can measure those later) FMark & number all 11 object and image distances on your paper FRecord the object size, orientation & location of each image (skip recording the object and image distances, you can measure those later)

Advice Group Roles 1 person measure the object and image distances 1 person calculate the focal point Remaining group members should do part 2 of the lab Group Roles 1 person measure the object and image distances 1 person calculate the focal point Remaining group members should do part 2 of the lab

FWhat is f? FWhat is C? FWhat is the relationship between f and C? FWhat is the image distance? FWhat is the object distance? FWhat is f? FWhat is C? FWhat is the relationship between f and C? FWhat is the image distance? FWhat is the object distance? f = the focal length C = the center of Curvature f = C/2 The focal length is ½ of the center of curvature d i = distance from paper to mirror d o = distance from light filament to mirror f = the focal length C = the center of Curvature f = C/2 The focal length is ½ of the center of curvature d i = distance from paper to mirror d o = distance from light filament to mirror

Curved Mirrors

Daily Work Organizer Friday Question of the Day: How can you find an image location without looking into a mirror? Do Now: Answer the problems on pg Agenda: Cornell notes (3-6) Mirror ray diagrams Discuss lab results Homework Monday’s Homework: Finish Reading log: Monday’s Homework: Finish Reading log:

Pg 37 Convex mirror Position: Size: Larger / Smaller / Same Orientation: Upright / Inverted Type: Real / Virtual Position: Size: Larger / Smaller / Same Orientation: Upright / Inverted Type: Real / Virtual

Convex mirror pg 37 Position: Size: Larger / Smaller / Same Orientation: Upright / Inverted Type: Real / Virtual Position: Size: Larger / Smaller / Same Orientation: Upright / Inverted Type: Real / Virtual Virtual Upright Smaller Behind the mirror

Convex mirror

Curved Mirror Vocab FC = center of curvature Fradius of curvature  f = focal point - rays converge FF = focal length Ff = C / 2 FC = center of curvature Fradius of curvature  f = focal point - rays converge FF = focal length Ff = C / 2 C f

Real vs Virtual Images FConcave Mirror FImage in front FImage is Real FLight rays converge FUse a Card FConcave Mirror FImage in front FImage is Real FLight rays converge FUse a Card

Real vs. Virtual Images FConcave Mirror FImage behind mirror FImage is virtual FAppears to converge FConcave Mirror FImage behind mirror FImage is virtual FAppears to converge

Concave Mirrors Cf through the focal point! Incoming Parallel rays reflect:

Concave Mirrors Cf parallel! Rays through (or from) f reflect:

Concave Mirrors Cf back through C! Rays through C reflect:

Convex Mirrors Cf away from focal point! Incoming parallel rays reflect:

Note: Only the red lines are used to locate the image Convex Mirrors Cf parallel! Rays towards focal point reflect:

Convex Mirrors Cf back away from C! Rays towards C reflect:

FImage Location

FChoose easiest paths FParallel FFocal Point F(Only need 2) FC “check” FChoose easiest paths FParallel FFocal Point F(Only need 2) FC “check” image

Finding the Image FDraw ray paths FIdentify Characteristics FDraw ray paths FIdentify Characteristics Beyond C larger inverted Real FR = Region FS = Size FO = Orientation FT = Type of Image

Now Go Make Your Own! Pages 30-33

Daily Work Organizer Friday Question of the Day: Do Now: Agenda:Homework Tuesday’s Homework: Finish Problems: Tuesday’s Homework: Finish Problems: 43-44

Homework Due Tuesday Every Scholar: FRay Diagrams (p ) Due Wednesday  Problems (p. 43 – 47) Due Friday  Cornell notes  Signed progress report  Physics text in binder Due Tuesday Every Scholar: FRay Diagrams (p ) Due Wednesday  Problems (p. 43 – 47) Due Friday  Cornell notes  Signed progress report  Physics text in binder Extra Credit:

Answers pg 31 FR = Region FS = Size FO = Orientation FT = Type of Image

Image Characteristics Concave and Convex

FConcave: FObject at center of Curvature FConcave: FObject at center of Curvature

FConcave FObject between C and F FConcave FObject between C and F

FConcave FObject between F and Mirror FConcave FObject between F and Mirror

Mirror Equations Solving for f

Mirror Equations FMagnification FReally 3 different equations FMagnification FReally 3 different equations

Mirror Equations Image Distance Focal Length Positive negative Concave mirrors Convex mirrors In front of mirror Behind mirror

Let’s try some examples!

1.1 A girl is using a concave makeup mirror to get ready for the prom and is 27 cm in front of the mirror. The image is 65 cm behind the mirror. a.Find the focal length of the mirror Let’s go over how to approach word problems… a.Find the focal length of the mirror Let’s go over how to approach word problems…

Solving Word Problems 1.List your given information (numbers you can use in eqns) make sure to label them with a variable sometimes this includes a picture 1.List your given information (numbers you can use in eqns) make sure to label them with a variable sometimes this includes a picture

1.1 A girl is using a concave makeup mirror to get ready for the prom and is 27 cm in front of the mirror. The image is 65 cm behind the mirror. a.Find the focal length of the mirror Given: f = ?

Solving Word Problems 2.Write out the equation you will use write it the way you will use it 2.Write out the equation you will use write it the way you will use it

1.1 A girl is using a concave makeup mirror to get ready for the prom and is 27 cm in front of the mirror. The image is 65 cm behind the mirror. a.Find the focal length of the mirror Given: f = ?

Solving Word Problems 3.Plug your numbers into the equation Do not forget your units! 3.Plug your numbers into the equation Do not forget your units!

1.1 A girl is using a concave makeup mirror to get ready for the prom and is 27 cm in front of the mirror. The image is 65 cm behind the mirror. a.Find the focal length of the mirror Given: f = ?

Solving Word Problems 4.Calculate and write your answer! Box it! 4.Calculate and write your answer! Box it!

1.5 A girl is using a concave makeup mirror to get ready for the prom and is 27 cm in front of the mirror. The image is 65 cm behind the mirror. a.Find the focal length of the mirror Given:

1.5 A girl is using a concave makeup mirror to get ready for the prom and is 27 cm in front of the mirror. The image is 65 cm behind the mirror. b.Find the Magnification of her image. Given:

1.2 You are 2.0 m tall and stand 1.5 m in front of a mirror. You see an image of yourself that is upright and half your size. a.What type of image is it? Why? Answer: Image is virtual. Why? Because image is upright.

1.2 You are 2.0 m tall and stand 1.5 m in front of a mirror. You see an image of yourself that is upright and half your size. b.What type of mirror is it? Why? Answer: Mirror is convex. Why? Because image is smaller and virtual.

1.2 You are 2.0 m tall and stand 1.5 m in front of a mirror. You see an image of yourself that is upright and half your size. c.Find the center of curvature 1st, find d i c.Find the center of curvature 1st, find d i Given: virtual! C = ?

1.2 You are 2.0 m tall and stand 1.5 m in front of a mirror. You see an image of yourself that is upright and half your size. c.Find the center of curvature solve for f c.Find the center of curvature solve for f Given: C = ?

1.2 You are 2.0 m tall and stand 1.5 m in front of a mirror. You see an image of yourself that is upright and half your size. c.Find the center of curvature solve for C c.Find the center of curvature solve for C Given: C = ?

1.3 A convex mirror has a center of curvature of 68 cm. If the image is located 22 cm from the mirror, where is the object? Given:

Daily Work Organizer Tuesday Question of the Day: Do Now: Answer problems 2-5 on pg 41 Agenda:Homework W/R Homework: Finish p W/R Homework: Finish p Extra Credit: Honors problems 12, 13, 14 Extra Credit: Honors problems 12, 13, 14

Answers 1.C 2.A 3.C 4.D 5.D 1.C 2.A 3.C 4.D 5.D

Homework Due Wednesday / Thursday  Problems (pg. 43 – 47)  Honors problems: #12-14 Due Friday  Cornell notes  Signed progress report  Physics text in binder Due Wednesday / Thursday  Problems (pg. 43 – 47)  Honors problems: #12-14 Due Friday  Cornell notes  Signed progress report  Physics text in binder Extra Credit: Honors problems 12, 13, 14 On pg 46 Extra Credit: Honors problems 12, 13, 14 On pg 46

Pg Each question is worth 3 points… 1 point for writing the given information on the left hand side and an equation you could use to solve the problem 1 point for the correct answer 1 point for a boxed answer 1 point for writing the given information on the left hand side and an equation you could use to solve the problem 1 point for the correct answer 1 point for a boxed answer Extra Credit: Honors problems 12, 13, 14 Extra Credit: Honors problems 12, 13, 14

Cornell Notes 1/3 for completeness 1/3 for notes and questions in margins 1/3 for summaries 1/3 for completeness 1/3 for notes and questions in margins 1/3 for summaries

Use your ray diagrams on page to fill out the table on pg. 38 Type of mirror Object position Image PositionRelative Size OrientationType concave Mirror to focus Center of Curvature At CSameInvertedReal

Daily Work Organizer Tuesday Question of the Day: Do Now: Answer problems 6-10 on pg 42 (you can use your table on pg 38) Agenda:Homework Friday Homework: Finish all cornell notes Finish Signed Progress Report PHYSICS TEXT! Friday Homework: Finish all cornell notes Finish Signed Progress Report PHYSICS TEXT! Extra Credit: Honors problems 12, 13, 14 Extra Credit: Honors problems 12, 13, 14

Answers 6.E 7.A 8.C 9.B 10.E 6.E 7.A 8.C 9.B 10.E

Vocab WordPicture that reminds you of definition DefinitionWord or words that remind you of definition Sentence using word Convex Outside of a sphere Convex mirrors have negative focal points - f and - C Outside of a sphere Convex mirrors have negative focal points - f and - C Convex mirrors only produce virtual images. The image is always behind the mirror. A surface that curves like the outside (exterior) of a sphere object +- f

Vocab WordPicture that reminds you of definition DefinitionWord or words that remind you of definition Sentence using word Concave If it rains, you could stand under a concave mirror to keep dry. If you stood between the mirror and focal point your image would be virtual. A surface that curves inwards like the inside of a sphere object Cave Inside of a sphere + f and + C Cave Inside of a sphere + f and + C +- f

Object beyond C f f f f f Object at C Object between f and C Object between f and the mirror C object C Image object CC Image Concave Mirrors Image type: The focal length is positive for concave mirrors The Center of curvature is positive for concave mirrors +-

notes Object anywhere f object C Image Convex Mirrors The focal length is negative for convex mirrors fC + - Image type: The object distance is always positive because the object cannot go behind the mirror Convex only produce virtual images

Stations! Station 8 Pink book card Ray diagrams (pg ) Daily Work Organizer Station 8 Pink book card Ray diagrams (pg ) Daily Work Organizer

Corrections to Practice Problems A.) d i = 22.3 cm h i = 1.95 cm A.) d i = 22.3 cm h i = 1.95 cm

Stations! Station 1: Spoons… Station 2: Gazing Globe Station 3: Make-up mirror… Station 4: Concave Mirror… Station 5: Dark Box Station 6: Practice problems Station 7: Real vs. virtual images Station 8: pg DWO Station 1: Spoons… Station 2: Gazing Globe Station 3: Make-up mirror… Station 4: Concave Mirror… Station 5: Dark Box Station 6: Practice problems Station 7: Real vs. virtual images Station 8: pg DWO