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a mixture of wavelengths range 5800 to 3500 angstroms is allowed to fall normally on a thin air film of thickness 0.2945micrometers . what is colour shown in reflection by thin film?

a mixture of wavelengths range 5800 to 3500 angstroms is allowed to fall normally on a thin air film of thickness 0.2945micrometers . what is colour shown in reflection by thin film?

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