A thin oil film on a water surface appears coloured because of

1.	A thin oil film on a water surface appears coloured because of
Answer» Interference A thin oil film on a WATER SURFACE APPEARS COLOURED because of thin-film interference which involves the interference of light waves reflecting off the TOP surface of a film with the waves reflecting from the bottom surface. The refractive index of oil is larger than that of water, therefore the reflection on the back side occurs.

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Interference

A thin oil film on a WATER SURFACE APPEARS COLOURED because of thin-film interference which involves the interference of light waves reflecting off the TOP surface of a film with the waves reflecting from the bottom surface. The refractive index of oil is larger than that of water, therefore the reflection on the back side occurs.

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A thin oil film on a water surface appears coloured because of

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