Question

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

• 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 in empty space
• D. Yellow light moves with the mean speed as that of the red and the violet light

Answer 1

The correct option is C All the colours of the white light move with the same speed in empty space

In vacuum, all the colours of white light move with the same speed. They have different wavelengths and frequencies but move with a contant speed $c=3\times {10}^{8}m/s$