Ive been reading a "theory" posted it on the internet, that claims time occurs at the speed of light, since that's the fastest an event can happen for a subatomic particle. I have also read that light radiates photons because the uncertainty principle makes electrons constantly in motion consequently causing photons to be emitted. Do these have any validity to them?
Neither statement is correct as posted.
Time occurs at the speed of light: This is sort of backwards...
The idea could relate to simple representation on a graph with time on the vertical and velocity on the horizontal axis...some here hate that representation...only light, no mass, can move along the horizontal axis at c and no time (vertical axis) passes; any mass moves between the two axis in the first quadrant...If you are stationary, no velocity, at the origin, then you pass entirely through time...
But a much better way to understand passage thru time is special relativity...and later general relativity...it turns out both velocity and gravitational potential effect the apparent passage of time...and different observers see different rates of passage...it turns out space and time are NOT fixedas we might think, but the speed of light IS
Photons are quanta of electromagnetic radiation and those we can observe by eye are called "light"...In genera;, light IS composed of photons, light doesn't emit them...
Can time be quantized...Are you implying that if light is quantized via photons then time must be quantized? That may or may not be true...one does not reflexively folloow from the other...
I'm unsure if anybody has a believable theory...relativity deals with space and time as continuous, but that does NOT mean it actually is in nature...that's simply how Einstein set up his mathematics...there are several long discussions here on quantizing space and time and whether there are maximum wavelengths and frequencies for things...one comes up against the Heisenberg uncertainty principle and Planck size stuff and things are blurred there so nobody knows just what happens...Various quantum theories are the best we can do so far...
Try here for more:
http://en.wikipedia.org/wiki/Time#Relativistic_time_versus_Newtonian_time