JEE PHYSICS MCQ: WAVE OPTICS

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Oil floating on water looks coloured due to interference of light. What should be the order of magnitude of thickness of oil layer in order that this effect may be observed?

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Correct option: A

10,000\mathop \mathrm{A}\limits^ \circ

Option A (

10,000\mathop \mathrm{A}\limits^ \circ

) is correct because the thickness of the oil layer must be on the order of the wavelength of visible light for interference to be observed.

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