Light waves projected on oil surface show seven colours due to the phenomenon of ____________.

Polarization

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Refraction

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Reflection

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Interference

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Solution

The correct option is D Interference
Light waves projected on oil surface show seven colours due to the phenomenon of interference. It is a phenomenon in which two waves superpose to form a resultant wave of greater, lower, or the same amplitude. It usually refers to the interaction of waves that are correlated or coherent with each other, either because they come from the same source or because they have the same or nearly the same frequency.

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