Lec25 - cture 25- cture 25- 1 Locating Images Real images...

Info iconThis preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: cture 25- cture 25- 1 Locating Images Real images form on the side of a mirror where the objects are, and virtual images form on the opposite side. only using the parallel, focal, and/or radial rays. cture 25- cture 25- 2 Mirror Equation and Magnification ' ' y s m y s = = ' s m s - s is positive if the object is in front of the mirror (real object) s is negative if it is in back of the mirror (virtual object) s is positive if the image is in front of the mirror (real image) s is negative if it is in back of the mirror (virtual image) m is positive if image and object have the same orientation (upright) m is negative if they have opposite orientation (inverted) f and r are positive if center of curvature in front of mirror (concave) f and r are negative if it is in back of the mirror (convex) 1 1 1 ' s s f + = ( f = r/2 ) cture 25- cture 25- 3 Demo 7A10 DOCCAM 2 7A-10 F and 2F Mirror 1/s + 1/s = 1/f magnification m m = - s / s s object distance s image distance f focal length f > 0 concave mirror f < 0 convex mirror cture 25- cture 25- 4 READING QUIZ 1 Which of the following statements is incorrect ? The statements describe the optical characteristics of the human eye. A| A near sighted eye focuses in front of the retina when observing an object located at infinity. B| A far sighted eye focuses behind the retina when observing an object located at infinity. C| A converging lens is used to correct the vision of a near sighted eye. D| Astigmatism is a condition where the eye does not have cylindrical symmetry about the central optical axis. E| A cataract operation of the second lens inside the eye removes the clouded lens and replaces it with a plastic implant. cture 25- cture 25- 5 s S Refracting Surface Formula 1 1 2 2 1 1 2 2 sin sin n n n n = 1 2 1 2 2 1 , ( ) n n n n = + = + + =- A point object O is placed on the central axis of a convex refracting surface. The center of curvature of the surface is at C . It is easy to see (for small angles) Derivation: 1 2 2 1 , ' , ' ac ac ac n n n s r n s s r s - + = = ) ) ) But Setting for parallel rays, the focal length...
View Full Document

This note was uploaded on 12/07/2011 for the course PHYS 241 taught by Professor Wei during the Fall '08 term at Purdue University-West Lafayette.

Page1 / 24

Lec25 - cture 25- cture 25- 1 Locating Images Real images...

This preview shows document pages 1 - 6. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online