transparent film of micaand glass are put in the path of two waves If their thickness are 3t and 2t respectively What should be

Question

transparent film of micaand glass are put in the path of two waves If their thickness are 3t and 2t respectively What should be refractive index of mica so that central maximum is found at O glass 1 5 3t H a u 125 S S 2t D h 15 O 10 mr 20 m doub

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