Why does the speed of light never change? These photons have no mass. Special Relativity tells us that any massless object has to travel at the speed of light. It cannot travel at any other speed whatsoever. That is why the photons travel only at the speed of light (in vacuum), and no other speed.
Why is light speed always constant? In the relativity theory, Einstein told us the curved space and inflation of time  . If the space is really curved and time is inflated, the ratio of space over time must keep constant. Only under this condition, there exists the possibility for the speed of light to keep as a constant.
Does light move at infinite speed? The common experience of turning on a light switch certainly shows that light travels very quickly. But careful experiments reveal that it travels at a finite speed. This speed, which we call “c,” is measured to be 300,000,000 meters per second.
Why did Einstein say speed of light is constant? Einstein hypothesized that, if something could travel faster than the speed of light, it would break fundamental physical laws by being able to observe, relatively speaking, a stationary electromagnetic wave. Thus, for his theory of relativity to work, he hypothesized that the speed of light must remain constant.
- Why does the speed of light never change? – Additional Questions
- What happens if speed of light is not constant?
- What limits the speed of light?
- What did Einstein say about the speed of light?
- Why was Einstein wrong on light?
- Is the speed of light constant in general relativity?
- Why is the speed of light absolute?
- Can time be stopped?
- How fast is the speed of dark?
- Does light have mass?
- Does light have color?
- Can light be bent by gravity?