But dont do any of it. Therefore light does not only travel at the speed of electromagnetic waves it is an electromagnetic wave. However those expressions were replaced by the concept of relativistic mass an expression which was first defined by.
But dont do any of it.
Just leave your answer as a math expression. The speed of light is 2998108ms. For a slower than light particle a particle with a nonzero rest mass the formula becomes where is the rest mass and is the Lorentz factor. Two physicists have extended Einsteins special relativity equations for faster-than-light travel although no one knows if its possible to move faster than the speed of light.