Converging lenses Diverging Lenses The Lens Equation We can make use of the fact that changing the focal length and position of the object we can change.

Slides:

Advertisements

Similar presentations

5) Magnifying glass (Simple magnifier)

Advertisements

Fisica Generale - Alan Giambattista, Betty McCarty Richardson Copyright © 2008 – The McGraw-Hill Companies s.r.l. 1 Chapter 24: Optical Instruments Combinations.

Convex and Concave Lenses

Reflection, Refraction and Lenses

Chapter 34 Geometric Optics. What is Geometric Optics It is the study of light as particles. Geometric optics treats light as particles (or rays) that.

1 From Last Time… Lenses and image formation Object Image Lens Object Image Thurs. Sep. 17, 2009Physics 208, Lecture 5.

(10.3/10.4) Mirror and Magnification Equations (12.2) Thin Lens and Magnification Equations.

and Optical Instruments

The Refraction of Light The speed of light is different in different materials. We define the index of refraction, n, of a material to be the ratio of.

Chapter 34: Thin Lenses 1 Now consider refraction through this piece of glass: optic axis This is called a “Double Convex Lens” converging light focal.

Ch. 18 Mirrors and Lenses Milbank High School. Sec Mirrors Objectives –Explain how concave, convex, and plane mirrors form images. –Locate images.

Chapter 36 Image Formation. Summary: mirrors Sign conventions: + on the left - on the right Convex and plane mirrors: only virtual images (for real objects)

26.6 Lenses. Converging Lens Focal length of a converging lens is real and considered positive.

Chapter 11 Review Mirrors & Lenses. What is an angle of incidence? 2 The angle between an incident ray and the normal of an optical device. Category:

Lenses PreAP Physics. Critical Angle At a certain angle where no ray will emerge into the less dense medium. –For water it is 48  which does not allow.

Curved Mirrors. Two types of curved mirrors 1. Concave mirrors – inwardly curved inner surface that converges incoming light rays. 2. Convex Mirrors –

Homework Set 4: From “Seeing the Light” Chapter 3: (starting page 101) P9, P10, P11, PM3 From “Seeing the Light” Chapter 4: P2, P5, P7, P13 Due: Monday,

PH 103 Dr. Cecilia Vogel Lecture 7. Review Outline  Lenses  ray diagrams  images  thin lens equation  Lenses  application to camera, eye, and corrective.

Lenses Physics 202 Professor Lee Carkner Lecture 21.

Copyright © 2009 Pearson Education, Inc. Lecture 2 – Geometrical Optics b) Thin Lenses.

Lecture 17 Ray Optics-3 Chapter 23 PHYSICS 270 Dennis Papadopoulos March 22, 2010.

Grade 8 Science Unit 2: Optics Chapter 6: Lenses refract light to form images.

Lenses Physics 202 Professor Lee Carkner Lecture 23.

Lenses Physics 202 Professor Lee Carkner Lecture 23.

Refraction (bending light) Refraction is when light bends as it passes from one medium into another. When light traveling through air passes into the glass.

Thin Lenses Chapter 15.

Module 1-4 Basic Geometrical Optics. Image Formation with Lenses Lenses are at the heart of many optical devices, not the least of which are cameras,

Lecture 14 Images Chp. 35 Opening Demo Topics –Plane mirror, Two parallel mirrors, Two plane mirrors at right angles –Spherical mirror/Plane mirror comparison.

A. can be focused on a screen. B. can be projected on a wall.

LENS APPLICATIONS 13.5 – PG. 567 to 570. TYPES OF LENS APPLICATIONS The Camera The Movie Projector.

Chapter 14 Section 2 Thin lenses.

Geometric Optics This chapter covers how images form when light bounces off mirrors and refracts through lenses. There are two different kinds of images:

Images formed by lenses. Convex (converging) lenses, f>0.

Lenses – Application of Refraction AP Physics B. Lenses – An application of refraction There are 2 basic types of lenses A converging lens (Convex) takes.

02/06/2016 Lenses and Images LO: to be able to describe images formed by different types of lenses Starter: make a list of any items you can think of that.

SEEING THROUGH A LENS.  We see the world through lenses.  Eye glasses = lenses. Contact lenses = lenses.  Magnifying glasses = lenses. Microscopes.

Thin Lenses. Any lens that is thicker in the center than at the edges will make parallel rays converge to a point and is called a converging lens. Lenses.

Today’s agenda: Death Rays. You must know when to run from Death Rays. Refraction at Spherical Surfaces. You must be able to calculate properties of images.

The Thin Lens Equation. Let’s us predict mathematically the properties of an image produced by a lens.

Thin Lens Chapter Bending of Light Any transparent object that is curved with affect the path of light rays. Ex: o Glass bottle full of water will.

November 6th, 2015 Katie Hellier IRIS Science Academy

Mirrors and Lenses. Mirrors and Images Key Question: How does a lens or mirror form an image?

Images Formed by Lenses Ray Diagrams for Lenses Ray diagrams can be used to predict characteristics of images using 3 rays, just like for concave.

AP Physics Mr. Jean February 10 th, The plan: Diverging Mirrors Lenses.

2/8/16Oregon State University PH 212, Class #161 The Thin-Lens Equation The thin lens approximation holds for a lens whose thick- ness is small compared.

SEEING THROUGH A LENS.  We see the world through lenses.  Eye glasses = lenses. Contact lenses = lenses.  Magnifying glasses = lenses. Microscopes.

Mirrors. Types of mirror There are two types of mirror Plane (flat) Curved Concave (curves in) Convex (curves out)

Special Case – Ray Diagrams Honors Physics. What if the object is ON “f “ ? ff Principal axis f C If the object is ON the focal point, no image is produced.

Thin Lenses. Two Types of Lenses Converging – Thicker in the middle than on the edges FOCAL LENGTH (+) POSITIVE Produces both real and virtual images.

Refraction. Refraction of Light When light waves pass from one medium to the next, its speed changes, causing it to bend. Going from lower to higher index.

Lenses Converging Lens Diverging Lens F F f f.

What have these all got in common?

Notes 23.3: Lenses and Images

13.4 The Lens Equation.

Thin Lenses-Intro Notes

Refraction at Spherical Surfaces.

Geometrical Optics Seminar add-on Ing. Jaroslav Jíra, CSc.

5.3: Using Lenses to Form Images

Lenses: Day 1 -Converging Lenses

Lens Equations.

Using Lenses to Form Images

Thin Lens Equation 1

5.3: Using Lenses to Form Images

Presentation transcript:

Converging lenses

Diverging Lenses

The Lens Equation We can make use of the fact that changing the focal length and position of the object we can change the size of the image created. The lens maker equation relates the distance of the object and image with the focal length

Using the “thin lens” equation: A few rules are necessary to use the equation: Object distances are always positive Image distances are positive for real images (when the image is on the opposite side of the lens as the object) and negative for virtual images (when the image is on the same side of the lens as the object). The focal length is positive for converging lenses and negative for diverging lenses.

Thin Lens Examples A converging lens has a focal length of 20 cm. An object is located 50 cm from the lens. What type of image will be formed, and where will it be located?

Magnification Many applications of lenses involve magnification. Magnification helps us see distant or small objects. For Example: a toy is placed 8 cm in front of a lens. An upright, virtual image of magnification 3 is seen. Where is the image located?

Applications of Optics What common devices use lens or mirrors? Overhead projector Telescope Microscope Binoculars Cameras Eye glasses Human eye

Telescopes Telescopes can be primarily composed of refracting lenses or reflecting mirrors.

Simplistic Telescope Diagrams

Telescope Optics

Magnifying Glasses What type of lens do you expect magnifying lenses use?

Overhead Projectors:

Eyes Eyes are complex optical devices! Notice the blind spot? What would happen if the focal point changed?

Corrective Lenses Eye glasses are used to ensure the image is focused on the sensors at the back of the eye.

Binoculars

Gravitational Lensing Lenses can take other forms…. Including galaxies or other massive objects. Objects with very high gravity bend light like a lens. This can create optical illusions!