A soap film of refractive index 4/3 and thickness `1.5xx10^(-4)`cm is illuminated by white light incident at angle `45^(@)`. The

A soap film of refractive index 4/3 and thickness `1.5xx10^(-4)`cm is illuminated by white light incident at angle `45^(@)`. The reflected light is examined by a spectroscope in which a dark band corresponding to the wavelength `5xx10^(-5)` cm is found. Find the order of the interference band

A soap film of refractive index 4/3 and thickness `1.5xx10^(-4)`cm is illuminated by white light incident at angle `45^(@)`. The reflected light is ex

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