Question

What is the ratio of the velocity of lights of wavelengths $4000 \AA \hspace{3} 8000\AA$ in vacuum ?

Answer 1

Velocity of lights of all wavelengths are same in vacuum.

The velocity is 3 × 10^8 m/s

For different wavelengths, the frequencies are different but velocity is the same.

Answer 2

Answer:

the ratio will be 1:1

as velocity of light is constant in vaccum = 3×10^8