Question

what is the difference between velocity of light & Speed of light

Answer 1

Answer:

That is because speed is a scalar and velocity is a vector

1. . Speed has just magnitude.

While velocity has magnitude( which is speed) and direction.

Answer 2

Answer:

The speed of light is constant. The velocity of light should be, unless light changes direction. Speed is the magnitude of velocity, a scalar quantity (has size, but not direction), whereas velocity is a vector, which has both magnitude and direction. c is defined as speed, which has only magnitude.