01_27_Anti_Refl_Coat

01_27_Anti_Refl_Coat - in the coating and in the glass?...

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Glass n = 1.5 Coating n = 1.3 1 2 t Physics 212 1/27 HW Handout Name________________________ Spring 2003 Anti-Reflection Coating Due Thursday 1/30 1) A lens manufacturer wants to coat the surface of a glass lens with a material so as to minimize the reflection of green light. The wavelength of green light in air is about 450nm. A diagram of the situation is shown below, also giving the indices of refraction (n’s) for the coating and the glass behind it. The angles are exaggerated for clarity, ignore their contribution to the PLD. a) What is the wavelength of the green light
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Unformatted text preview: in the coating and in the glass? Show your work. b) Which rays, 1 or 2, underwent a phase shift upon reflection? Both? Neither? Only one? Explain your reasoning. c) Find the thickness of the thinnest coating of the given material that will minimize the reflection of green light. (destructive for = 450nm ) Explain your reasoning. d) Find the thickness of the thinnest coating of a new coating material with n = 1.7 that will minimize the reflection of green light. Explain your reasoning....
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This note was uploaded on 12/21/2010 for the course PHYS Physics 21 taught by Professor Larrywatson during the Spring '08 term at North Dakota.

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