When the speed is equal to the speed of light, time stops; when the speed is higher than the speed of light, time reverses What does this sentence mean? Why do many scientists agree I feel that what he said is that you can also think that it is equal to the speed of light, and time stops because you are so fast that you can't see time going, But beyond the speed of light, time goes backwards, which I can't imagine why Who can explain it scientifically~

When the speed is equal to the speed of light, time stops; when the speed is higher than the speed of light, time reverses What does this sentence mean? Why do many scientists agree I feel that what he said is that you can also think that it is equal to the speed of light, and time stops because you are so fast that you can't see time going, But beyond the speed of light, time goes backwards, which I can't imagine why Who can explain it scientifically~

This point of view is referred to Einstein's theory of relativity. It says that when the speed of an object reaches or approaches the speed of light, the mass and shape of the object change, so that the object can travel through time and space. As for why, scientists may not know. However, the above is only a theoretical point of view. In fact, we need to see the progress of science and technology

Is the speed of signal transmitted by optical fiber equal to the speed of light?

The reason is very simple. The optical fiber is an optical dense medium, N1. According to the formula v = C / N (V is the speed of light propagation in this medium), V & lt; C is the second and most important point. The path of light in the optical fiber is a broken line (propagating in the way of total reflection), which increases the propagation distance of light. Therefore, the propagation speed of light in the optical fiber is less than the speed of light

Is the speed of electromagnetic wave equal to the speed of light in vacuum?
Well, there's another one:
Electromagnetic wave only transmits sound and image, but not power.
Give me an example-

Note that light is electromagnetic wave, which is the visible wave band, so V light = V electromagnetic wave. Therefore, in vacuum, the velocity of both is about 3 * 10 ^ 8m / s