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A uniform thin film of alcohol (n=1.36) lies on a flat glass plate (n = 1.56). when mono chromatic light, whose wavelength can be changed, is incident normally, the reflected light is a minimum for λ=512 nm and a maximum for λ=635 nm. What is the minimum thickness of the film ? |
| Answer» A uniform thin film of alcohol (n=1.36) lies on a flat glass plate (n = 1.56). when mono chromatic light, whose wavelength can be changed, is incident normally, the reflected light is a minimum for λ=512 nm and a maximum for λ=635 nm. What is the minimum thickness of the film ? | |