On a rainy day,a small oil film on water show | vedclass

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(B) The phenomenon of brilliant colours seen on a thin oil film on water is due to the interference of light.When white light falls on a thin film of

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Interference of light

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(B) The phenomenon of brilliant colours seen on a thin oil film on water is due to the interference of light.When white light falls on a thin film of oil,the light waves reflect from both the top and bottom surfaces of the film.These reflected waves undergo superposition,leading to constructive or destructive interference depending on the path difference and the wavelength of the light.Since the thickness of the oil film varies,different wavelengths (colours) undergo constructive interference at different points,resulting in the observation of brilliant colours.

On a rainy day,a small oil film on water shows brilliant colours. This is due to

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