Critical angle of light passing from glass to air is minimum for :

Red

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Green

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Yellow

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Violet

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Solution

The correct option is D Violet
Violet light has the shortest wavelength and the largest refractive index within the visible light region. Thus it bends the most when passing from glass to air. As a result its critical angle is minimum.

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Critical angle of light passing from glass to air is minimum for ___ colour.

42^{\circ}

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