Question

What is the ratio of the velocities of two light waves whose wavelengths are 4000A and 8000 A, respectively, through zero medium?​

Answer 1

Answer:

Since light is an electromagnetic wave and it is the property of all the electromagnetic waves that they travel with same speed equal to 3×108 m/s in vacuum. Hence ratio of velocities of light of wavelength 4000 Ao and 8000 Ao in vacuum is 1:1.