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Question

When light is incident on soap bubble, colours are produced. This phenomenon is due to

A
surface tension
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B
polarisation
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C
Dispersion (colours are scattered)
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D
Interference
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Solution

The correct option is D Interference
A phase shift occurs upon reflection of light from front and back surface of bubble. Interference between various rays that are reflected off produces patterns of light which can appear either as light and dark bands or as colorful bands depending upon the source of the incident light.

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