Assertion: Thin films such as a soap bubble o | vedclass

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(C) The Assertion is correct because thin films exhibit interference patterns when illuminated by white light,resulting in the observation of colours.

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If the Assertion is correct but Reason is incorrect.

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(C) The Assertion is correct because thin films exhibit interference patterns when illuminated by white light,resulting in the observation of colours.However,the Reason is incomplete and therefore incorrect. The phenomenon of interference in thin films occurs due to the superposition of light waves reflected from $BOTH$ the upper surface $AND$ the lower surface of the thin film,not just the upper surface. The path difference between these two reflected rays leads to constructive or destructive interference for different wavelengths,which creates the observed colours.

Assertion: Thin films such as 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.

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Assertion: Thin films such as 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.