What is equation proof of theory of relativity?

Answer 1

Equations are just statements. They don't prove anything.

The theory of relativity predicted things that couldn't be measured at the time

Einstein published his work. Since then, of course, measurement techniques have

gotten a lot better, and the predictions of relativity have been checked out, both

in laboratories on Earth and astronomical measurements. So far, in thousands of

experiments and observations over roughly the past hundred years, whenever a

group of scientists set up something to check relativity, it checks out.

Here is the one I always like to mention:

-- The Theory of Relativity predicted that when a clock moves, it slows down,

and the faster it moves, the slower it runs.

-- A correction for that had to be built into the GPS satellites, otherwise GPS

wouldn't work. Oh, it would work, but the location where it says you are would

be seriously wrong, and it wouldn't be of much use to anybody.