Which of the following statements is correct regarding the propagation of light of different colours of white light in the air?

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Red light moves the fastest

Blue light travels slower than green light

All colours of white light move with the same speed

Yellow light moves with mean speed as that of red and violet lights

answer is C.

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Detailed Solution

“All colours of white light move with the same speed”. This is the correct statement regarding the propagation of white light in the air.
The speed of all the colours of white light is the same in the air. Therefore, there is no change in speed in the speed of light of different colours, but the wavelengths and frequencies of different colours of white light are different. The difference in their wavelengths is V<I<B<G<Y<O<R, where V is violet, I is indigo, B is blue, G is green, Y is yellow, O is orange, and R is red.

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