Refraction 5/4/15 5/4Reflection mystery 5/5Refraction TB p 558 #1-10 5/6Refraction TB p 558 #1-10 5/7Snell’s Law TB p. 561 read and CN Essential Questions TB p 564 HW: TB p. 562 #1-3 5/8 Refraction Fun TB p. 566

Date: 5/4Objective: I can investigate the refraction of light. Bell Ringer: #10 and 11

Date: 5/4Objective: I can investigate the refraction of light. Textbook page 558

Date: 5/4Objective: I can investigate the refraction of light. With your group, complete TB p. 558 #1-10 Member #1 positions mirror and laser for #1,3,5,7,9 Member #2 reads directions for #1,3,5,7,9 Member #3 positions mirror and laser for #2,4,6,8,10 Member #4 reads directions for #2,4,6,8,10 All members write results Be careful with the lasers. DO NOT DIRECT the lasers near anyone’s eyes! Point lasers towards windows and door

Date: 5/5Objective: I can investigate the refraction of light. Bell Ringer: #10 and 11

Date: 5/5Objective: I can investigate the refraction of light. Bell Ringer: #12 and 13

Date: 5/5Objective: I can investigate the refraction of light. Textbook page 558

Date: 5/5Objective: I can investigate the refraction of light. With your group, complete TB p. 558 #1-10 Member #1 positions mirror and laser for #1,3,5,7,9 Member #2 reads directions for #1,3,5,7,9 Member #3 positions mirror and laser for #2,4,6,8,10 Member #4 reads directions for #2,4,6,8,10 All members write results Be careful with the lasers. DO NOT DIRECT the lasers near anyone’s eyes! Point lasers towards windows and door

Date: 5/5Objective: I can review the reflection of light. Independently complete Workbook page 200 and 206

Date: 5/6Objective: I can investigate the refraction of light. Bell Ringer: #10 and 11

Date: 5/6Objective: I can investigate the refraction of light. Bell Ringer: #12 and 13

Date: 5/6Objective: I can investigate the refraction of light. Textbook page 558

Date: 5/6Objective: I can investigate the refraction of light. With your group, complete TB p. 558 #1-10 Member #1 positions mirror and laser for #1,3,5,7,9 Member #2 reads directions for #1,3,5,7,9 Member #3 positions mirror and laser for #2,4,6,8,10 Member #4 reads directions for #2,4,6,8,10 All members write results Be careful with the lasers. DO NOT DIRECT the lasers near anyone’s eyes! Point lasers towards windows and door

Date: 5/7Objective: I can investigate the refraction of light. With your group, complete TB p. 558 #1-10 Member #1 positions mirror and laser for #1,3,5,7,9 Member #2 reads directions for #1,3,5,7,9 Member #3 positions mirror and laser for #2,4,6,8,10 Member #4 reads directions for #2,4,6,8,10 All members write results Be careful with the lasers. DO NOT DIRECT the lasers near anyone’s eyes! Point lasers towards windows and door

Date: 5/8Objective: I can investigate the refraction of light. Bell Ringer: Draw a picture of what you observed when the laser was pointed at the acrylic block?

Date: 5/8Objective: I can investigate the refraction of light. TB p

Date: 5/8Objective: I can investigate the refraction of light. Independently read TB p and take cornell notes

Date: 5/8Objective: I can investigate the refraction of light. Bell Ringer: Draw a picture of what you observed when the laser was pointed at the acrylic block?

Date: 5/8Objective: I can investigate the refraction of light. Independently read TB p and take cornell notes Complete HW: TB p. 562 #1-3

Date: 5/8Objective: I can investigate the refraction of light. Independently read TB p and take cornell notes review

Date: 5/8Objective: I can investigate the refraction of light. Complete WB p Complete HW: TB p. 562 #1-3

Date: 5/8Objective: I can investigate the refraction of light. Complete WB p

Date: 5/8Objective: I can investigate the refraction of light. Explore the refraction of light? Shine the 3 light laser at each of the different shapes. Draw your predicted result. Test your result

Date: 5/8Objective: I can investigate the refraction of light. Explore the refraction of light? Combine shapes together to make the most creative design

Date: 5/8Objective: I can investigate the refraction of light. video

Date: 4/27Objective: I can understand characteristics of reflection Bell Ringer Use passage II to answer #8-9

Date: 4/27Objective: I can I can understand characteristics of reflection Video

Date: 4/28Objective: I can investigate the images from curved mirrors Independently Read Article Answer Questions on a separate piece of paper

Date: 4/29Objective: I can investigate the images from curved mirrors Bell Ringer: Use passage II to answer #10-11

Date: 4/27Objective: I can I can understand characteristics of reflection With your shoulder partner complete TB p. 543 #1,2,3 TB p. 546 #1,2,3,6,10

Date: 4/29Objective: I can investigate the images from curved mirrors Bell Ringer: Use passage II to answer #10-11

Date: 4/29Objective: I can investigate the images from curved mirrors With your group, complete TB p. 548

Date: 4/29Objective: I can investigate the images from curved mirrors With your group, complete TB p. 548 #1-17 Member #1 positions mirror and laser for #1,3,5,7,9,11,13,15,17 Member #2 reads directions for #1,3,5,7,9,11,13,15,17 Member #3 positions mirror and laser for #2,4,6,8,10,12,14,16 Member #4 reads directions for #2,4,6,8,10,12,14,16 All members write results Be careful with the lasers. DO NOT DIRECT the lasers near anyone’s eyes! Point lasers towards windows and door

Date: 4/30Objective: I can investigate the images from curved mirrors With your group, complete TB p. 548 #1-17 Member #1 positions mirror and laser for #1,3,5,7,9,11,13,15,17 Member #2 reads directions for #1,3,5,7,9,11,13,15,17 Member #3 positions mirror and laser for #2,4,6,8,10,12,14,16 Member #4 reads directions for #2,4,6,8,10,12,14,16 All members write results Be careful with the lasers. DO NOT DIRECT the lasers near anyone’s eyes! Point lasers towards windows and door

Date: 4/30Objective: I can investigate the images from curved mirrors Independently read TB p and take Cornell notes 10 min

Date: 4/30Objective: I can investigate the images from curved mirrors Independently read TB p and take Cornell notes 10 min HW: TB p. 552 #1-3

Date: 4/30Objective: I can investigate the images from curved mirrors Independently read TB p. 551 and take Cornell notes Discuss reading

Date: 5/1Objective: I can understand how light is reflected from curved mirrors Independently complete Essential Questions TB p 554

Date: 5/1Objective: I can understand how light is reflected from curved mirrors Independently complete Essential Questions TB p 554 Share with your shoulder partner

Date: 5/1Objective: I can understand how light is reflected from curved mirrors In a convex mirror, what happens to your image?

What is reflection? Reflection is when any wave bounces off a surface and changes direction. Water waves, slinky waves, sound waves, and light waves can all be reflected.

What is a ray?  To make light waves easier to represent when talking about reflection, we use a ray system to describe them.  A ray is an individual beam of light.  Objects that produce light create an infinite number of rays in ALL directions.  Rays travel in straight lines.

What is a ray?  In this class, we model individual rays with laser pointers, because they produce straight beams of light (and they’re inexpensive).  NEVER POINT A LASER INTO ANOTHER STUDENT’S EYE.  THIS CAN CAUSE PERMANENT BLINDNESS.  THIS IS A SUSPENDABLE OFFENSE. NO JOKING AROUND!

What is a ray?  Observe this animation of a ray striking a mirror.  We call a ray that strikes a surface the incident ray.  The direction an incident ray strikes a mirror depends on an imaginary line called a normal. Incident ray Normal Mirro r

What is a normal? Remember – a normal is imaginary, but it follows certain rules. The normal MUST make a perfect 90° angle with the mirror surface. The normal MUST be drawn where the incident ray strikes the mirror surface. Normals should be drawn as a dashed line, NOT a solid line.

Sample #1

1. Place the hole in your protractor where the incident ray strikes the mirror, and line it up with the mirror itself.

Sample #1 2. Make a mark on your paper at the 90° point on your protractor. 90 °

Sample #1 3. Use your protractor to draw a dashed line from the mirror to the mark you made.

Sample #1 4. Label the mirror, incident ray, and normal for each sample. Mirror Incident Ray Normal

Sample #2

Sample #3

Sample #4

Measuring angles The angle a ray strikes a surface at is called the angle of incidence. As a variable, angle of incidence = θ i Mirror Incident Ray Normal

Measuring angles The angle of incidence is measured between the incident ray and the normal…NOT the mirror! Mirror Incident Ray Normal θiθi NOT HERE Angle of incidenc e

Measuring angles Place the hole of your protractor where the incident ray meets the normal, and turn the protractor so that it lines up with the normal. Mirror Incident Ray Normal θiθi

Measuring angles Count up from zero degrees until you reach the incident ray. Mirror Incident Ray Normal θ i = ?

Law of reflection Mirror Incident Ray Normal θiθi Rays reflect off a surface at the same angle they struck it with. This reflected angle is the angle of reflection. Reflected Ray Angle of incidenc e θrθr Angle of reflection

Law of reflection Mirror Incident Ray Normal θiθi The law of reflection shows that the two angles are the same. Reflected Ray Angle of incidenc e θrθr Angle of reflection

Image formation Mirror Images form ‘inside’ a mirror, NOT on its surface. Specifically, images form on the opposite side of the mirror’s surface. These are known as ‘virtual’ images. All reflected rays appear to come from an image. Object Image

Image formation Mirror Virtual images are located an equal distance from the mirror surface as the object, and are the same size. This is true for every point on the original object. The image’s SIZE is the same as that of the object. Object Image

Image formation Mirror Virtual images are located an equal distance from the mirror surface as the object, and are the same size. This is true for every point on the original object. The image’s SIZE is the same as that of the object. Object Image

Image formation Mirror Virtual images are located an equal distance from the mirror surface as the object, and are the same size. This is true for every point on the original object. The image’s SIZE is the same as that of the object. Object Image

Image formation Mirror Light from an object reflects off the mirror to your eye, according to the law of reflection. EyeObject Image

Image formation Mirror The reflected rays seem to diverge from the image. EyeObject Image

Image formation Mirror This is why we say that all reflected rays seem to come from the image. EyeObject Image

Image formation Mirror Although the position of the observer might change, the image location does not. Eye Object Image

Image formation Mirror Although the position of the observer might change, the image location does not. Eye Object Image

Curved Mirrors There are two different types of curved mirrors, based on what direction they curve in. – Concave mirrors curve inwards (like a cave). – Convex mirrors curve outwards. A metal spoon is both concave AND convex. – Liquids go in the concave part. – The back of the spoon is convex.

Concave mirrors

Convex mirrors

Curved mirrors Both types of curved mirrors must follow the law of reflection.

Curved mirrors Since the surface of the mirror curves, each normal changes in order to stay at a right angle to the surface.

Curved mirrors The law of reflection causes each reflected ray to converge on one point, known as the focal point. Focal Point

Concave mirrors This property is used in radar and satellite dishes. Even though these dishes aren’t reflective for VISIBLE light, they are highly reflective for radio waves.

Curved mirrors Convex mirrors behave similarly, but their focal point is on the virtual side of the mirror.

Curved mirrors Convex mirrors behave similarly, but their focal point is on the virtual side of the mirror. Focal Point

Convex mirrors Convex mirrors are good at reflecting light around corners, seeing more of a room, and keeping images rightside-up. For this reason, most security mirrors are convex.

Properties of Curved Mirrors Concave Mirrors Can produce images either BIGGER or SMALLER than the object, depending on where the object is. – Producing larger images is known as magnification. Can produce images rightside- up OR upside-down, depending on where the object is. – ‘Upside-down’ is known as inverted. Convex Mirrors Can only produce images SMALLER than that of the object, regardless of where the object is. Can only produce images that are rightside-up, regardless of where the object is.

Reflection Vocabulary Real Image – – Image is made from “real” light rays that converge at a real focal point so the image is REAL – Can be projected onto a screen because light actually passes through the point where the image appears – Always inverted

Reflection Vocabulary Virtual Image– – “Not Real” because it cannot be projected – Image only seems to be there!

Virtual Images in Plane Mirrors If light energy doesn't flow from the image, the image is "virtual". Rays seem to come from behind the mirror, but, of course, they don't. It is virtually as if the rays were coming from behind the mirror. "Virtually": the same as if As far as the eye-brain system is concerned, the effect is the same as would occur if the mirror were absent and the chess piece were actually located at the spot labeled "virtual image".

Hall Mirror Useful to think in terms of images “image” you “real” you mirror only needs to be half as high as you are tall. Your image will be twice as far from you as the mirror.

LEFT- RIGHT REVERSAL

Curved mirrors What if the mirror isn’t flat? – light still follows the same rules, with local surface normal Parabolic mirrors have exact focus – used in telescopes, backyard satellite dishes, etc. – also forms virtual image

Concave Mirrors Curves inward May be real or virtual image View kacleaveland's map Taken in a place with no name (See more photos or videos here)more photos or videos here "Have you ever approached a giant concave mirror? See your upside-down image suspended in mid-air. Walk through the image to see a new reflection, right-side-up and greatly magnified. In the background you see reflected a room full of visitors enjoying other

For a real object between f and the mirror, a virtual image is formed behind the mirror. The image is upright and larger than the object. For a real object between f and the mirror, a virtual image is formed behind the mirror. The position of the image is found by tracing the reflected rays back behind the mirror to where they meet. The image is upright and larger than the object.

For a real object between f and the mirror, a virtual image is formed behind the mirror. The position of the image is found by tracing the reflected rays back behind the mirror to where they meet. The image is upright and larger than the object. For a real object close to the mirror but outside of the center of curvature, the real image is formed between C and f. The image is inverted and smaller than the object. For a real object between C and f, a real image is formed outside of C. The image is inverted and larger than the object.

For a real object between f and the mirror, a virtual image is formed behind the mirror. The position of the image is found by tracing the reflected rays back behind the mirror to where they meet. The image is upright and larger than the object. For a real object close to the mirror but outside of the center of curvature, the real image is formed between C and f. The image is inverted and smaller than the object. For a real object between C and f, a real image is formed outside of C. The image is inverted and larger than the object. For a real object at C, the real image is formed at C. The image is inverted and the same size as the object. For a real object at C, the real image is formed at C. The image is inverted and the same size as the object.

For a real object between f and the mirror, a virtual image is formed behind the mirror. The position of the image is found by tracing the reflected rays back behind the mirror to where they meet. The image is upright and larger than the object. For a real object close to the mirror but outside of the center of curvature, the real image is formed between C and f. The image is inverted and smaller than the object. For a real object close to the mirror but outside of the center of curvature, the real image is formed between C and f. The image is inverted and smaller than the object.

For a real object at f, no image is formed. The reflected rays are parallel and never converge. For a real object at f, no image is formed. The reflected rays are parallel and never converge. What size image is formed if the real object is placed at the focal point f?

Date: 4/30Objective: I can investigate the images from curved mirrors Video

Date: 4/20Objective: I can investigate light and how shadows are created. Open TB to p. 530 Part A

Date: 4/21Objective: I can investigate light and how shadows are created. With your group complete TB to p. 530 Part A #1-9 5 min

Date: 4/21Objective: I can investigate light and how shadows are created. Independently read Text book p read and take cornell notes 10 min

Date: 4/21Objective: I can investigate light and how shadows are created. Independently read Text book p. 533 read and take cornell notes 10 min Light rays in holes – straight line –sun rays and laser Shadow- dark area where light is absent Size of the Shadow- distance between light, object and screen Sun Shadow –Angle Umbra-shadow of no light Penumbra- shadow edge that receives some light

Date: 4/21Objective: I can investigate light and how shadows are created. Independently read Text book p. 533 read and take cornell notes point vs extended light source

Date: 4/21Objective: I can investigate light and how shadows are created. Video

Date: 4/22Objective: I can investigate the reflection of light in a mirror Bell Ringer: Review questions 37-38

Date: 4/22Objective: I can investigate the reflection of light in a mirror Get a Textbook Independently answer Essential Questions p min

Date: 4/22Objective: I can investigate the reflection of light in a mirror Get a Textbook Independently answer Essential Questions p min HW: TB p. 537 #1-5

Date: 4/22Objective: I can investigate the reflection of light in a mirror As a class read TB p. 538

Date: 4/22Objective: I can investigate the reflection of light in a mirror With your group, complete TB p. 538 #1-13 Member #1 positions mirror and laser for #1,3,5,7,9,11,13 Member #2 reads directions for #1,3,5,7,9,11,13 Member #3 positions mirror and laser for #2,4,6,8,10,12 Member #4 reads directions for #2,4,6,8,10,12 All members write results Be careful with the lasers. DO NOT DIRECT the lasers near anyone’s eyes! Point lasers towards windows and door

Date: 4/23Objective: I can investigate the reflection of light in a mirror Bell Ringer: Review questions 38-39

Date: 4/23Objective: I can investigate the reflection of light in a mirror With your group, complete TB p. 538 #1-13

Date: 4/23Objective: I can investigate the reflection of light in a mirror With your group, complete TB p. 538 #1-13 Member #1 positions mirror and laser for #1,3,5,7,9,11,13 Member #2 reads directions for #1,3,5,7,9,11,13 Member #3 positions mirror and laser for #2,4,6,8,10,12 Member #4 reads directions for #2,4,6,8,10,12 All members write results Be careful with the lasers. DO NOT DIRECT the lasers near anyone’s eyes! Point lasers towards windows and door

Date: 4/24Objective: I can understand characteristics of reflection Bell Ringer : question #40

Date: 4/24Objective: I can understand characteristics of reflection With your group, complete TB p. 538

Date: 4/24Objective: I can understand characteristics of reflection With your group, complete TB p. 538 #1-13 Member #1 positions mirror and laser for #1,3,5,7,9,11,13 Member #2 reads directions for #1,3,5,7,9,11,13 Member #3 positions mirror and laser for #2,4,6,8,10,12 Member #4 reads directions for #2,4,6,8,10,12 All members write results Be careful with the lasers. DO NOT DIRECT the lasers near anyone’s eyes! Point lasers towards windows and door

Date: 4/24Objective: I can understand characteristics of reflection TB page 541

Date: 4/24Objective: I can understand characteristics of reflection Independently read TB page and take cornell notes 10 min

Date: 4/24Objective: I can understand characteristics of reflection Independently read TB page and take cornell notes 10 min HW: TB p. 537 #1-5

Date: 4/24Objective: I can understand characteristics of reflection Independently read TB page min Mirror – larger image? Angle? Angle of incidence? Incident ray Angle of reflection-reflected ray

Law of reflection Mirror Incident Ray Norm al θiθi Rays reflect off a surface at the same angle they struck it with. This reflected angle is the angle of reflection. Reflected Ray Angle of incidenc e θrθr Angle of reflection

Date: 4/24Objective: I can understand characteristics of reflection Independently read TB page min Law of reflection

Date: 4/24Objective: I can understand characteristics of reflection Independently read TB page min Light waves – transverse waves No medium for light waves – vacuum Light carries energy