an interference filter based on the first order interference is to be

QUESTION

an interference filter based on the first order interference is to be constructed. It is indicated that the filter will be used to isolate a band centered at 720 nm. Assuming a refractive index of 1.35 for the dielectric layer, what thickness would you recommend?
wave number , v = 1 wave length , ? = 720nm refractive index , n = 1.34 If path difference is equal wave length , then first order interference is occured. Let thickness of the layer be t¦

Path difference = nx t According to the above statement n x t = ? ? t = ? / n = ( 720x 10 -9 m) / 1.35 = 205x 10 -9 m = 205 nm

ANSWER:

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