>>23993048If you passed high school math you can understand the underpinning for special relativity. I'd suggest googling a video or something.
Basically the idea is this:
>By observation, the speed of light is the same in all reference frames.>The laws of physics should be the same in all reference frames.Reference frames here refers to where we're making observations from.
If you're on a boat sailing or on the coast, you see different things--neither feels like they're moving, but both see the other move. Physics should be the same in both though, and the speed of light is too.
From this, you can construct special relativity, and space-time is an extension of this (with much more complicated math) that allows for accelerating reference frames.
Pic related is the standard introduction for seeing why relativity must exist. If we define one time period as the time it takes light to go from the bottom plate, bounce off the top plate, and return to hit the bottom plate, then we see a moving clock has light that travels further than a stationary one. Since light goes the same speed anywhere, this means time itself much change when you move.
