Again, about the theory of relativity, maybe the theory of relativity was wrong in the first place

Personally, I don't think quality and speed have anything to do with it! After all, the theory of relativity was put forward by Einstein himself, and it is a theory that people think is right and used until now, but many of these things are only at the theoretical level and have not been tested in practice.

The conversion of energy and mass energy to each other has been proven in practice (nuclear ** is like this) then if an object does motion it must emit energy outward, then the mass of this object will only decrease and not increase, so I think he is wrong!

Ylouis, the essence of this question seems to be the same as my "is the quality relative", hehe.

That is, relative to a fixed observer, such as you: you yourself think that the object is stationary, and then measure its mass; Then the mass of the object can be measured again in case of its motion, and it will be found.

m m0 (2nd power root of (1-u*u c*c)); m0 is the mass of the object at rest, and u is the velocity of the object.

In other words, in any frame of reference, there will be such a relationship established.

This m0 only needs to measure the relative rest, and the result is the same in any relatively resting situation.

When an object is moving, its velocity is relative, so the mass is also relative, and the key is to see what kind of coordinate system you use to observe.

Such a question is not something that the average brain can figure out.

If you can figure it out, you're a great physicist.

Just do your job.

I don't think about it anyway, I get dizzy when I think about it.

Children should read more!

What the theory of relativity predicted has not been denied by experiments, but has been slowly confirmed by experiments.

Light is a photon, also called a quantum of light, which is a Standard Model boson with a spin of 1 and a rest mass of 0. (There is also a particle with a mass of 0 called gluons).

Think about it, the velocity of a massless particle, and other particles with mass, such as neutrinos, will reach its speed?

Today, what people are looking for is not a neutrino, but a boson with a spin of 0, called the Higgs boson, a particle that is designated as the source of matter.

Isn't there a recent experiment that says neutrinos are fast in light?