chapter36_mirrors

# chapter36_mirrors - Chapter 36 Image Formation 1 1 Flat...

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Chapter 36 Image Formation 1: 1. Flat mirror 2. Spherical mirrors

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Find the image, method 2, the mirror/lens equation When a spherical mirror is given, we know its radius R . Under paraxial condition , the angle is small, and from the law of reflection and focal point definition, we have That is the focal length is 2 R f = for a converging mirror. N V NCF f 1 2 CF FN CN =
From the ray diagram to mirror equation O I h V O h I h O h I p OV = q IV = Objective: Find the equation that connects object distance, image distance and the focal length. f FV = Triangle and are similar: h II F VAF B A Triangle and are similar: h OO F VBF O I h f h q f = - - O I h p f h f - = - f p f q f f - = - So: 1 1 1 p q f + =

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From the ray diagram to mirror equation O I h V O h I h O h I B A O I h f h q f = - - And : 1 1 1 p q f + = From 1 1 1 1 I O h q f h f q f q p q q p - = - = - - = - + - = - One has :
Converging spherical mirror formulas 1 1 1 p q f + = I O h q M h p f = - Object distance, image distance and focal length: Focal length and sphere radius: 2 R f = Object distance, image distance and magnification:

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chapter36_mirrors - Chapter 36 Image Formation 1 1 Flat...

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