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a) What is the minimum index of refraction of a clear material if a minimum thickness...

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Physics

a) What is the minimum index of refraction of a clear materialif a minimum thickness of 122 nm , when laid on glass, is needed toreduce reflection to nearly zero when light of 675 nm is incidentnormally upon it? Assume that the film has an index less than thatof the glass.

I got nmin=2.76 and it is saying incorrect.. used theequation 2t=m λn not sure what I am doingwrong

b) What is the main index of refraction of the material if thefilm has an idea greater than that of the glass?

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Assume that the film has an index less than that of the glass a The minimum index of refraction of a clear material which    See Answer
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