Einstein Showed That Time Is Relative. But … Why Is It?

Nah, not 20 m/second. To them the ball is moving at 30m/s (eg, 10 + 20). Many things for common sense. The difference arises from the fact that they are measuring from different “reference frames”, one running, the other is fixed.

Although all is well; Everyone agrees about the results. If the ball hurts the person, the miscreants and the Bystander will count the same time on the same effect. Yes, people are watching the ball moving slowly, but they are approaching by the Bystander (from their point of view), so it does the same thing in the end.

This is the other major postula of special relativity: physics for all reference frames the same-or specific, all “involvement” or non-exterminating, specified for the frame. Observers can move at different speeds, but those velocity must be constant.

However, now you can see why it is really bizarre that the speed of light is the same for all observers, regardless of their speed.

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How did Einstein get this crazy idea? I’m going to show you two reasons. The first one is an electronic magnetic wave of light. Physicists have long known that the light behaved like a wave. However a need of waves of waves Medium To “wave” to do. Water is needed for sea waves; Sound waves require air. Remove the medium and has no waves.

But then, what was the sunlight passing through the space through space? In the 1800s, many physicists believed that the place must have a medium and they told it Luminiferus Ather Because it’s fun to say.

In 1887, Albert Micleson and Edward Morley did a cute test to detect this Ether. They created a device called an interferometer, which split a beam of half light and sent half along two paths of equal length, closing the mirror and merges again on a detector: like:

Figure: Rate Alline