Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Section 1 Refraction Chapter 14 Refraction of Light The speed of.

Slides:

Advertisements

Similar presentations

Refraction of Light Chapter 17. Index of refraction When light travels from one material to another it usually changes direction The bending of light.

Advertisements

Chapter 15 Pretest Light and Refraction

Refraction of Light Chapter 18, Section 1.

Characteristics of Lenses Lens  Is a transparent object with at least one curved side that causes light to refract.  Have 2 sides  Either side could.

Chapter 26 Geometrical Optics. Units of Chapter 26 The Reflection of Light Forming Images with a Plane Mirror Spherical Mirrors Ray Tracing and the Mirror.

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.

Light: Geometric Optics

Welcome to Optics JEOPARDY PHysics Final Jeopardy Question Reflection Mirrors 100 Lens refraction Special topics.

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu To View the presentation as a slideshow with effects select “View”

Geometric Optics Conceptual MC Questions. If the image distance is positive, the image formed is a (A) real image. (B) virtual image.

Refraction of Light Light changes direction (bends) as it crosses a boundary between 2 media in which the light moves at different speeds. Amount of refraction.

Lenses A transparent object used to change the path of light Examples: Human eye Eye glasses Camera Microscope Telescope Reading stones used by monks,

RefractionSection 1 © Houghton Mifflin Harcourt Publishing Company Preview Section 1 RefractionRefraction Section 2 Thin LensesThin Lenses Section 3 Optical.

Broadneck Physics – Chapter 17 – Refraction of Light

Broadneck Physics Water Corn Syrup Water Vegetable Oil Water.

The Refraction of Light: Lenses and Optical Instruments

Refraction and Lenses Light bends--so you can see better!

Refraction and Lenses Light bends--so you can see better!

Refraction. Optical Density  Inverse measure of speed of light through transparent medium  Light travels slower in more dense media  Partial reflection.

The Refraction of Light: Lenses and Optical Instruments.

Refraction & Lenses Chapter 18. Refraction of Light n Look at the surface of a swimming pool n Objects look distorted n Light bends as it goes from one.

© 2005 Pearson Prentice Hall This work is protected by United States copyright laws and is provided solely for the use of instructors in teaching their.

Refraction By: Alicia Fadley. Refraction Refraction- the bending of a wave front as the wave front passes between two substances in which the speed of.

Copyright © 2010 Pearson Education, Inc. Lecture Outline Chapter 26 Physics, 4 th Edition James S. Walker.

Dr. Andrew Tomasch 2405 Randall Lab

Fundamental Physics II PETROVIETNAM UNIVERSITY FUNDAMENTAL SCIENCES DEPARTMENT Vungtau, 2013 Pham Hong Quang

Optics 2: REFRACTION & LENSES. REFRACTION Refraction: is the bending of waves because of the change of speed of a wave when it passes from one medium.

Chapter 14 Section 2 Thin lenses.

Light refraction.

Chapter 34 Lecture Eight: Images: II. Image Formed by a Thin Lens A thin lens is one whose thickness is small compared to the radii of curvature For a.

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Refraction Chapter 14 Table of Contents oRefraction and Snell’s Law.

Optical Phenomenal Chapter 14 section 3. Objectives  Predict whether light will be refracted or undergo total internal reflection.  Recognize atmospheric.

Optical Density - a property of a transparent medium that is an inverse measure of the speed of light through the medium. (how much a medium slows the.

Lesson 25 Lenses Eleanor Roosevelt High School Chin-Sung Lin.

1. How is the index of refraction calculated? How is light refracted as it speeds up? How is light refracted as it slows down? Index of refraction = speed.

SNC2D Chapter 13. Lenses A transparent object used to change the path of light Examples: Human eye Eye glasses Camera Microscope Telescope Reading stones.

Refraction When light passes from one medium to another, it bends.

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Waves and Particles The two most commonly used models describe light.

Physics: Principles with Applications, 6th edition

The Refraction of Light: Lenses and Optical Instruments

Sound and LightSection 4 Section 4: Refractions, Lenses, and Prisms Preview Key Ideas Bellringer Refraction of Light Lenses Dispersion and Prisms.

© Houghton Mifflin Harcourt Publishing Company Preview Objectives Refraction of Light The Law of Refraction Sample Problem Chapter 14 Section 1 Refraction.

 Mirrors that are formed from a section of a sphere.  Convex: The reflection takes place on the outer surface of the spherical shape  Concave: The.

Lenses. Refraction (p 308) Refraction occurs when a wave changes the direction in which it is moving This is caused by a change in speed as the wave passes.

Refraction of Light Refraction Refraction –Refraction occurs when light waves traveling from one medium to another with a different density bend. –The.

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Refraction Chapter 14 Table of Contents Section 1 Refraction Section.

Chapter 19. Reflection The smooth surface of the lake reflects light rays so that the observer sees an inverted image of the landscape.

Light refraction Chapter 29 in textbook.

Chapter 14 Preview Objectives Refraction of Light

Chapter 14.  The brain judges the object location to be the location from which the image light rays originate.

Index of Refraction. The ratio of the speed of light in vacuum to the speed of light v in a given material is called the index of refraction, n of the.

Refraction and Lenses. Refraction is the bending of light as it moves from one medium to a medium with a different optical density. This bending occurs.

Refraction of Light Chapter 18, Section 1. Refraction  When light encounters a transparent or translucent medium, some light is reflected from the surface.

1 REFRACTION OF LIGHT. 2 Chapter 18 Objectives: 1) Define refraction of light including examples. 2) Know which direction a light ray bends as it travels.

Geometrical Optics.

Refraction Thin Lenses. Objectives Use ray diagrams to find the position of an image produced by a converging or diverging lens, and identify the image.

Speed of light In a vacuum, light travels at a speed of 3 x 10 8 m/s. In any other medium, such as air, water, glass, etc., light travels slower. MaterialSpeed.

Refraction & Lenses. Refraction of Light When a ray of light traveling through a transparent medium encounters a boundary leading into another transparent.

Thin Lenses.  When light passes through a lens, it refracts twice ◦ Once upon entering the lens and once upon leaving  Exiting ray is parallel to the.

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Multiple Choice 1. How is light affected by an increase in the index.

Chapter 18: Refraction and Lenses

A farsighted person’s cornea and lens focus images behind the retina

Refraction and Lenses.

How to Use This Presentation

bending of a ray of light

Chapter 15: Refraction.

Refraction Optical Phenomena.

Physics Projects Color wheel Types of mirrors and uses

Refraction Optical Phenomena.

Presentation transcript:

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Section 1 Refraction Chapter 14 Refraction of Light The speed of light in a vacuum, c, is 3.00 x 10 8 m/s. Inside of other mediums, such as air, glass, or water, the speed of light is different and is slightly less than c. As a light ray travels from one medium into another medium where its speed is different, the light ray will change its direction unless it travels along the normal. The bending of light as it travels from one medium to another is call refraction.

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Chapter 14 Refraction Section 1 Refraction

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Chapter 14 Wave Model of Refraction Section 1 Refraction

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Section 1 Refraction Chapter 14 The Law of Refraction The index of refraction for a substance is the ratio of the speed of light in a vacuum to the speed of light in that substance.

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Chapter 14 Indices of Refraction for Various Substances Section 1 Refraction

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Section 1 Refraction Chapter 14 The Law of Refraction, continued When light passes from a medium with a smaller index of refraction to one with a larger index of refraction (like from air to glass), the ray bends toward the normal. When light passes from a medium with a larger index of refraction to one with a smaller index of refraction (like from glass to air), the ray bends away from the normal.

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Chapter 14 Refraction Section 1 Refraction

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Section 1 Refraction Chapter 14 The Law of Refraction, continued Objects appear to be in different positions due to refraction.

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Section 1 Refraction Chapter 14 The Law of Refraction, continued Snell’s Law determines the angle of refraction.

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Chapter 14 Image Position for Objects in Different Media Section 1 Refraction

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Practice A Pg. 493 # 1, 3

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Practice Problems 1.H. G. Wells wrote a famous novel about a man who made himself invisible by changing his index of refraction. What would his index of refraction have to be to accomplish this? 2.Would the invisible man be able to see anything? 3.Find the angle of refraction for a ray of light that enters a bucket of water from the air at an angle of 25.0° to the normal. 4.Open books to page 493 and finish number 2 Chapter 14 Section 1 Refraction

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Lenses A transparent object that refracts light rays such that they converge or diverge to create an image. Examples: Human eye Eye glasses Camera Microscope Telescope Reading stones used by monks, nuns, and scholars ~1000 C.E.

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Lenses THERE ARE ALWAYS TWO REFRACTIONS IN A LENS

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Lenses Two basic shapes Converging (convex) lens Diverging (concave) lens

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Chapter 14 Focal Length for Converging and Diverging Lenses Section 2 Thin Lenses

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Converging Lens A lens that has its thickest part in the middle Causes all incident parallel rays to converge at a single point (the focal point) after refraction

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Converging Lens OPTICAL CENTER: the exact center of the lens

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Ray diagrams for Converging Lenses

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Ray diagrams for Converging Lenses

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Images through Converging Lenses Let’s practice

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Converging Lenses Can produce real and virtual images The size and attitude will vary depending on the location of the object Many uses including to correct for far-sightedness LocationSizeAttitudeLocationType Beyond 2F ’ SmallerInvertedBehindReal At 2F ’ SameInvertedBehindReal Between 2F ’ and F ’ LargerinvertedBehindReal At F ’ No clear image Inside F ’ largeruprightIn frontVirtual Object Image

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Diverging Lens A lens that has its thinnest part in the middle Causes all incident parallel light rays to spread apart after refraction

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Diverging Lens

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Ray diagrams for Diverging Lenses

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Ray diagrams for Diverging Lenses

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Images through Diverging Lenses Let’s practice

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Diverging Lenses Only produce virtual images that are always smaller, upright and in front of the lens Used to correct near-sightedness (can see objects close up)

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Section 2 Thin Lenses Chapter 14 The Thin-Lens Equation and Magnification The equation that relates object and image distances for a lens is call the thin-lens equation. It is derived using the assumption that the lens is very thin.

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Section 2 Thin Lenses Chapter 14 The Thin-Lens Equation and Magnification, continued Magnification of a lens depends on object and image distances.

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu + object distance - Image distance + focus +Image distance Converging lens: Diverging lens: + object distance - Image distance - focal length

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Practice B An object is placed 30.0 cm in front of a converging lens with a focal length of 10.0 cm. Find the image distance and the magnification. Same object is placed 12.5 cm in front of a diverging lens with focal length of 10.0 cm. Find the image distance and the magnification. Pg. 501 #1, 2, 3

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Applications of Lenses

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Section 2 Thin Lenses Chapter 14 Eyeglasses and Contact Lenses The transparent front of the eye, called the cornea, acts like a lens. The eye also contains a crystalline lens, that further refracts light toward the light-sensitive back of the eye, called the retina. Two conditions, myopia and hyperopia, occur when light is not focused properly retina. Converging and diverging lenses can be used to correct these conditions.

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Chapter 14 Section 2 Thin Lenses Farsighted and Nearsighted

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Section 2 Thin Lenses Chapter 14 Combination of Thin Lenses An image formed by a lens can be used as the object for a second lens. Compound microscopes use two converging lenses. Greater magnification can be achieved by combining two or more lenses. Refracting telescopes also use two converging lenses.

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Chapter 14 Compound Light Microscope Section 2 Thin Lenses

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Chapter 14 Refracting Telescope Section 2 Thin Lenses

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Total Internal Reflection Total internal reflection can occur when light moves from a medium with a higher index of refraction to one with a lower index of refraction. At the critical angle, refracted light makes an angle of 90º with the normal. Above the critical angle, total internal reflection occurs and light is completely reflected within a substance.

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Total Internal Reflection

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Section 3 Optical Phenomena Chapter 14 Total Internal Reflection Total internal reflection can occur when light moves along a path from a medium with a higher index of refraction to one with a lower index of refraction. At the critical angle, refracted light makes an angle of 90º with the normal. Above the critical angle, total internal reflection occurs and light is completely reflected within a substance.

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Section 3 Optical Phenomena Chapter 14 Total Internal Reflection, continued Snell’s law can be used to find the critical angle. Angle of incidence is the critical angle and angle of refraction is 90 degrees. Total internal reflection occurs only if the index of refraction of the first medium is greater than the index of refraction of the second medium.

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Chapter 14 Total Internal Reflection Section 3 Optical Phenomena

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Section 3 Optical Phenomena Chapter 14 Atmospheric Refraction Refracted light can create a mirage. A mirage is produced by the bending of light rays in the atmosphere where there are large temperature differences between the ground and the air.

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Chapter 14 Dispersion of Light Section 3 Optical Phenomena

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Section 3 Optical Phenomena Chapter 14 Dispersion Dispersion is the process of separating polychromatic light into its component wavelengths. White light passed through a prism produces a visible spectrum through dispersion.

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Chapter 14 Section 3 Optical Phenomena Rainbows

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Chromatic Aberration When all colors of light do not come to focus at the same point Because of dispersion (prisms, rainbows), violet light refracts more than red light

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Correction Spherical & chromatic aberrations can be “corrected” High quality lenses for expensive cameras use a combination of many lenses to reduce aberration as much as possible

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Chapter 14 Converging and Diverging Lenses Section 2 Thin Lenses

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Chapter 14 Ray Tracing for a Converging Lens Section 2 Thin Lenses

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Chapter 14 Ray Tracing for a Diverging Lens Section 2 Thin Lenses