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  4. Colours appear on a thin soap film and on soap bubbles because of the phenomenon of:

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Q. Colours appear on a thin soap film and on soap bubbles because of the phenomenon of:

Haryana PMTHaryana PMT 2000

Solution:

The colours seen in a soap bubble arise from interference of light reflecting off the front & back surfaces of the thin soap film. Depending on thickness of film, different colours interfere constructively & destructively.