Why does light even move? what force makes it move at insane speed?
In: 193
Space and time are two sides of the same coin. All objects move at maximum speed, but sometimes they are moving through space fast and sometimes they are moving through time fast. The faster you travel through one the the slower you travel through the other, though the reason for why these speeds are dependent on mass is yet unknown.
Photons have zero mass, so they move through space at maximum speed, and time at does not pass for them from their vantage point. The opposite is true for black holes. These are extremely massive and time from your vantage point would just about stop the further you go to the singularity if you were to fall into it.
No force pushes the photon. Interestingly, movement at the speed of causality (the speed of light – the fastest that the universe can send signals through itself) is the default state of things in the universe – it just depends on how fast they are moving through space and of they are moving forward through time.
Edit: botched a word
Edit 2: I got something backwards, another user pointed out that time basically stops from an outside perspective for you if you travel into a black hole, not inside. What I meant to say is that from the inside time is going so slow for you but very fast for the rest of the universe that you would see billions of years or more of the future of the universe as you fell in. I think I’m getting that right.
Latest Answers