Chapter 13: Lenses and Optical Devices

Slides:

Advertisements

Similar presentations

Advertisements

Convex and Concave Lenses

(c) McGraw Hill Ryerson Using Lenses to Form Images A lens is a piece of transparent material that can bend, or refract, light rays in useful.

Types of Lenses If you have ever used a microscope, telescope, binoculars, or a camera, you have worked with one or more lenses. A lens is a curved transparent.

Section 12.2 Pages Lens Terminology The principal axis is an imaginary line drawn through the optical centre perpendicular to both surfaces.

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.

Optics and Light Lenses form images by refracting light.

Curved Lenses SNC2P – Optics. Lenses Lenses are thin pieces of glass or plastic that have at least one curved side. There are two basic types of lenses:

Predicting Images in Convex and Concave Lenses. When the object is located at twice the focal length (2F)

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

Its now time to see the light…..  A lens is a curved transparent material that is smooth and regularly shaped so that when light strikes it, the light.

Ray Diagrams for Lenses. Convex (Converging) Lenses There are two Focal points One in Front and one Behind Focal point is ½ way between Center of Curvature.

Copyright © 2010 McGraw-Hill Ryerson Ltd. What are lenses and what are some of their applications? Topic4.6 (Pages )

Converging Lenses Section 4.6 Lesson 13. Lenses A lens is a thin transparent piece of glass or plastic that has at least one curved side –The sides can.

LENSES AND THE FORMATION OF IMAGES. Lenses We see the world through lenses… Eye glasses = lenses Contacts = lenses Magnifying glasses = lenses Microscopes.

Lenses and the Formation of Images. Basic Lens Shapes Converging Lens -thickest in the middle (thinnest at edge) -causes parallel light rays to converge.

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.

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

Ray Diagrams for Lenses

Lenses: Drawings Lesson 9 November 23rd, 2010.

Lenses Converging and Diverging Lenses.

Lenses Topic 13.4.

Glencoe Chapter 18 Mirrors and Lenses

While you are watching the video think about why this is happening.

2 types of lenses just like mirrors

What have these all got in common?

OPTICS Refraction in Lenses.

Images in Lenses.

Properties of lenses.

Lenses and Ray Diagrams

Refraction & Lenses Sections 11.7 and 11.8.

Image Characteristics

Predicting Images in a Convex Lens

LENSES By Jamie Ortiz.

Notes 23.3: Lenses and Images

Lenses and Ray Diagrams

Chapter 7 Light and Geometric Optics

Learning Objectives To make observations about lenses of differing shapes To become familiar with the terminology of lenses.

Introduction to Lenses

Converging Lenses Section 4.6 Lesson 13.

Lenses and Ray Diagrams.

Lenses and Ray Diagrams.

Images Formed by Lenses

14-2 Thin lenses.

Properties of lenses.

5.3 Using Lenses to Form Images

Lenses and Image.

Lenses Lesson 10.

Images Formed by Lenses

Convex and Concave Lenses

The image formed by a lens

13.3 Images in Lenses.

Jeopardy Click to begin..

LENSES A lens is defined as - A ground or molded piece of glass, plastic, or other transparent material with opposite surfaces either or both of which.

Images Formed by Lenses

Lenses A lens is a transparent material (with at least one curved side) that causes light refracts in a predictable and useful way. Each ray is refracted.

Ch.6 Lens (透鏡).

5.3 Using Lenses to Form Images

Mirrors and Lenses chapter 14

5.3: Using Lenses to Form Images

Lenses: Day 1 -Converging Lenses

Ray Diagrams for Concave Lenses

Lenses 2: DIVERGING LENSES

Using Lenses to Form Images

5.3: Using Lenses to Form Images

5.3 Using Lenses to Form Images

Lenses and Optical Devices

Presentation transcript:

Chapter 13: Lenses and Optical Devices 13.1 Lenses and the Formation of Images

Basic Lens Shapes There are two basic shapes of lenses: Concave Lenses (Diverging) Convex Lenses (Converging)

Types of Lenses

Converging Lens Diverging Lens Parallel light rays converge through a single point after they travel through the lens. Lens is thickest in the middle Diverging Lens Parallel light rays diverge after they travel through the lens. Lens is thickest at the edge

Lenses use Refraction Light is refracted twice as it passes through a lens: once from air to glass, and once from glass to air. Ray diagrams are simplified by drawing a dashed line through the center of the lens and showing refraction occurring at this line.

Diverging Concave Lens

terminology Axis of Symmetry: imaginary vertical line drawn through the optical centre perpendicular to the principal axis (through the middle of the lens) Optical centre: point where the axis of symmetry meets the principal axis Principal focus: where all the rays meet. Secondary principal focus: point on the other side of the lens equal in distance from the principal focus.

Click on this hyperlink to see a diverging lens in action

Diverging (Concave) Lenses Light rays of a diverging lens do not converge. If you project these diverging rays backwards, it looks as if they come from a virtual focus.

Uses of Concave Lenses Images formed are smaller, virtual and upright. Some types of eyeglasses and telescopes use concave lenses along with convex lenses (which are more useful)

Converging (Convex) Lens

Click on this hyperlink to see converging lens in action

Ray Diagrams with Converging Lenses Table 11.7 on p. 453 1)Copy this table into your notebook (includes uses) 2)Copy the steps for drawing a convex lens ray diagram on page 454 in your notebook.

Homework / Classwork P. 454 #1-4