Minimum thickness of nonreflecting film on glass lens for 500 nm light

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Homework Statement



A transparent film (n = 1.6) is deposited on a glass lens (n = 1.76) to form a nonreflective coating. What is the minimum thickness that would minimize reflection of light with wavelength 500 nm in air?

Homework Equations



wavelengthXfrequency=c/n (Not sure if that's relevant)

The Attempt at a Solution



Not sure how to start. I'm having trouble with this problem. Can someone please help
 

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titan81 said:

Homework Statement



A transparent film (n = 1.6) is deposited on a glass lens (n = 1.76) to form a nonreflective coating. What is the minimum thickness that would minimize reflection of light with wavelength 500 nm in air?

Homework Equations



wavelengthXfrequency=c/n (Not sure if that's relevant)

The Attempt at a Solution



Not sure how to start. I'm having trouble with this problem. Can someone please help

Welcome to the PF.

How do anti-reflection coatings on optics work?
 
I'm not sure. Thats my problem. I'm completely lost on this topic.
 
Have you Googled on anti-reflective coatings? Lens designers choose coatings and apply them such that internal reflections between individual elements of a lens are minimized, at least for the wavelengths that the sensor (human eye, chip, etc) can sense.