: How does gravity cause time distortion ?

Question

I just can’t put my head around the fact that gravity isn’t just a force

EDIT : I now get how it gets stretched and how it’s comparable to putting a ball on a stretchy piece of fabric and everything but why is *gravity* comparable to that. I guess my new question is what is gravity ? 🙂 and how can weight affect it ?

In: Physics

Answer 1

The easiest way is to think about this:

We *know* that no matter how you are moving everyone observes light to travel at c.

So person A sitting in the chair measures a photon at c. PersonB flying in a rocket at .99c STILL MEASURES a photon flying past them to travel at C. We know this because they discovered it trying to investigate something else.

Now consider that if light always moves at c regardless of frame of reference, how else can equations that deal in time or distance make sense?

Distance = velocity times time. If velocity MUST be constant at light speed, what else can change?