Monochromatic light of wavelength, lambda, is traveling in air. The light then strikes a thin film having an index of refraction, n1 that is coating a material having an index of refraction n2. If n1 is larger than n2, what minumim film thickness will result in minimum reflection of this light?A. lambda/(4*n2)B. lambda/n2C. lambda/4D. lambda(2*n1)E. lambdaF. lambda/(2*n2)G. lambda/n1H. lambda/(4n1)I. lambda/2

The  correct option is  H

Explanation:

From the question we are told that

    The index of refraction of  coating is  

       The  index of refraction of material  is  

Generally the condition for constructive for a thin film interference is mathematically represented

Here  t represents the thickness

For minimum thickness  m =  0

So

=>        

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small = small current large mag large current