Many years ago, Einstein as a young lad was thinking to himself:

*"What would happen or what would I see if I travelled at the speed of light? Would I see light waves or photons freeze in their tracks because I'm moving just as fast as them and thus the relative velocity between them and me is zero?"*And many years later, Einstein was convinced that

**.**

*no matter how fast one travels at, even at the speed of light, one will still see light travel at the speed of light*Why?

Well, to first understand the situation, you must first understand the fundamental problem in Einstein's

*gedanken*, that is,

**?**

*can you even see a stationary light wave*The answer is a resounding and definite

**Light, being composed of photons, are**

*NO!***. From Einstein's mass energy equation, we therefore know that the total energy of a photon must be composed of its**

*massless particles***, that is, its**

*momentum-energy***, because it has no mass at all.**

*kinetic energy*Now, to view a photon that is stationary, is then to view a photon without its kinetic energy - by denying a photon its kinetic energy, one

**. By travelling up to the speed of light,**

*essentialy annihillates that photon from sight***, then the light waves that one sees while travelling at the speed of light, must still be moving, and can't be at zero velocity.**

*and to insist that one can still see light*You all got that? Haha.

And I guess I'll stop here for a while - I'll come back to explain further (in another post) why you need to be massless to move at the speed of light. :)

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