Assertion: Thin films such a soap bubble or a thin layer of oil on water show beautiful colours when illuminated by white light.
Reason: It happens due to the interference of light reflected from the upper surface of the thin film.

If both assertion and reason are true but the reason is the correct explanation of assertion

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If both assertion and reason are true but the reason is not the correct explanation ofassertion

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If assertion is true but reason is false

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If both the assertion and reason are false

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If reason is true but assertion is false

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Solution

The correct option is C If assertion is true but reason is false
C
When white light is incident on thin film, the film appears coloured. These colours are due to the interference between light waves reflected from the top and bottom surfaces of thin films. The colour depends on the thickness of the film and also the angle of incidence of the light.

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