A thin film problem?

  • #1

Homework Statement



A glass (Refractive index 1.33) is coated with a thin film. (Refractive index 1.50)

Find the minimum thickness of the film, if the glass is to transmit light of wavelength λ.

Homework Equations



The Attempt at a Solution



Light reflected from the upper surface of the film will suffer phase difference. That's all I know about this problem. Are we looking for constructive interference or destructive interference?
 

Answers and Replies

  • #3
Redbelly98
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It sounds like they probably want 100% transmission, so constructive interference for transmission, destructive for reflection.
 

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