Q. 2

The speeds of red light and yellow light are exactly the same
A. in vacuum but not in air

B. in air but not in vacuum

C. in vacuum as well as in air

D. neither in vacuum nor in air.

Answer :

The speed of light in vacuum is constant and does not depend on characteristics of the wave (e.g. its frequency, polarization, etc.). In other words, in vacuum red and yellow colored light travel at the same speed c.

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