Question

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

(a) Red light moves fastest.
(b) Blue light moves faster than green light.
(c) All the colours of the white light move with the same speed.
(d) Yellow light moves with the mean speed as that of the red and the violet light.
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Answer 1

Explanation:

All the colours of the white light move with the same speed

Answer 2

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(c) All the colours of the white light move with the same speed.

• The propagation of light of different colours of white light in air or vacuum move with the same speed but different wavelengths and frequencies.