Einstein showed that it is relative time. But … why is that?

No, not 20 m / s. The ball moves to them in 30 m / s (ie 10 + 20). So much for common sense. The difference comes from the fact that they are measured from “different reference frames”, one moving and the other constant.

That’s all good, though; All agree on the outcome. If the ball hit the person, the miscellaneous and leader will calculate at the same time. Yes, people in the car see the ball moving slowly, but they also see the archive moving towards them (from their point of view), so it does the same at the end.

This is another primary hypothesis of specific relativity: Physics is the same for all reference or specific frames for all “inertia” or non -accelerator. Observers can move at different speeds, but this speed should be constant.

Anyway, you may now be able to see why it is really strange that the speed of light is the same for all observers regardless of their movement.

Waves in an empty sea

How did Einstein get this crazy idea? I’m going to show you two reasons. The first is that light is an electromagnetic wave. Physicists have long known that light behaves like a wave. But waves to Intermediaries Need water for “wave” in ocean waves. Audio waves need air. The media has removed and there is no wave.

But then, how did the sun pass through the space? In the 1800s, many physicists believed that there should be a space and call them Ether Because it is fun to say.

In 1887, Albert Micheelson and Edward Morley invented a clever test to identify the Attar. They built a device called the interference meter that divides a ray of light by half and sends the half into two paths with equal lengths, the mirrors turn off and merge it again, such as:

Image: Rhett Allain