24 Geometric Optics Water drop as a converging

Reflection at a Plane Surface Image and Object Rays diverging from one point P

Object & Image Distances 1. 2. 3. 4. 5. Object distance Image distance Real

Sign Rules s: The (real) object distance is positive. (The distance is negative for

Reflection at a Spherical Surface Mirror Equation

$Refraction at a Spherical Surface$

Imaging thru Thin –Lens: Principal Rays http: //www. mtholyoke. edu/~mpeterso/classes/phys 301/geomopti/ lenses. html

Summary: Reflection at a Spherical Surface

$Summary: Refraction at a Spherical Surface & Thin Lenses$

Example: The Eye’s Lens The least distance of distinct vision (LDDV): 25 cm ~

Homework Ch 24 Problems: : 1, 4, 5, 6, 13, 20, 29, and 32

quiz (1) Construct the images using principal rays for a converging lens and a

Test 3 Grade Distribution # of Students: 30 Average: 12. 8=64% 6 5 4

Test 3 Grade Distribution # of Students: 21 Average: 11. 7=59% 4 3 2

Slides: 29

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24 Geometric Optics Water drop as a converging lens

Reflection at a Plane Surface Image and Object Rays diverging from one point P (object) recombine at point P’ by mirror or lens— an image formed.

Object & Image Distances 1. 2. 3. 4. 5. Object distance Image distance Real image Virtual image Magnification

Sign Rules s: The (real) object distance is positive. (The distance is negative for a virtual object. ) s’: The image distance (s’) is positive for all real images and negative for virtual images. y and y’: Heights are positive if measured upward from the principal axis and negative if measured downward. m: Magnification is positive if the image is erect and negative when inverted. f: The focal length is positive for converging mirrors and lenses, and negative for diverging ones.

Reflection at a Spherical Surface Mirror Equation

Focal Point & Focal Length-Concave

Image Construction—Concave

Focal Point & Focal Length-Convex

Image Construction—Convex

Image Construction—Principal Rays

Image Construction—Practice

$Refraction at a Spherical Surface$

Refraction at a Spherical Surface

How Deep is the Pool?

Thin Lenses—Converging

Thin Lenses—Diverging

Thin-Lens Equations

Imaging thru Thin –Lens: Principal Rays http: //www. mtholyoke. edu/~mpeterso/classes/phys 301/geomopti/ lenses. html

Principal Rays: Practice

Summary: Reflection at a Plane Surface

Summary: Reflection at a Spherical Surface

Summary: Graphical Methods for Mirrors

$Summary: Refraction at a Spherical Surface & Thin Lenses$

Summary: Refraction at a Spherical Surface & Thin Lenses

Summary: Graphical Methods for Lenses

Example: The Eye’s Lens The least distance of distinct vision (LDDV): 25 cm ~ 10 in

Mirror/Lens Equation

Homework Ch 24 Problems: : 1, 4, 5, 6, 13, 20, 29, and 32 Answers to multiple choice problems

quiz (1) Construct the images using principal rays for a converging lens and a convex mirror, respectively. (2) Find the locations of images using lens/mirror equation (f = +5 or -5 cm, s = 8 cm).

Test 3 Grade Distribution # of Students: 30 Average: 12. 8=64% 6 5 4 3 2 1 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

Test 3 Grade Distribution # of Students: 21 Average: 11. 7=59% 4 3 2 1 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20