Give the ratio of velocities of light rays of wavelength 4000Å and 8000Å in vacuum.

What is the ratio of velocities of light rays of wavelengths 4000 Å and 8000 Å in vacuum?

Give the ratio of velocities of light rays of wave length 4000A^@ and 6000^@ in vacuum.

Why is the ratio of the velocities of light of wavelengths 4000 Å and 8000 Å in vacuum 1 : 1?

Give the ratio of velocities of light rays of wave length 4000 overset(@)A and 8000 overset(@)A in vacuum.

Give the ratio of velocities of light waves of wavelengths 4000 lambda and 8000 lambda in vacumm.

Give the ratio of velocities of light rays of equal wavelength in vacuum.

Find the ratio of frequencies of light waves of wavelengths 4000 A and 8000 A.

Find the ratio of frequencies of light waves of wavelengths 4000 A and 8000 A.