# Thread: I want a full simple explan about The theory of relativity

1. Hi, : I want a full simple explan about The theory of relativity of Albert Einstein , that tha explan is simple and complete . and thanks a lot

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4. Hi. Ok, here are a few important things you need to know about Special Relativity:
1. Light is always observed to travel at the same speed. The speed of light is 300,000,000 m/s (pretty fast) and this is the speed limit of the universe, nothing can travel faster. But here is where it gets weird. Lets say you were standing on the side of a road and a car was travelling past you at 100km/h. If someone in the car threw a ball forward at 50 km/h, the ball would be travelling at 150km/h (just simple speed addition). However lets say you were on a space station and a space shuttle zoomed past you at half the speed of light, and someone on the shuttled pointed a torch forwards and turned it on, we would expect to see the light tavelling at 1.5 times the speed of light. But this is actually not what happens. We still see the light travelling at only the normal speed of light.

2. This is because when matter moves, it contracts (becomes shorter) in the direction of its motion. Clocks on board also tick slower.

Here is a link to a thread on this forum made by Janus, one of our moderators: http://www.thescienceforum.com/Speci...mer-19044t.php

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6. Originally Posted by Bodo AnTaKa
Hi, : I want a full simple explan about The theory of relativity of Albert Einstein , that tha explan is simple and complete . and thanks a lot
Why not make a wish for something more obtainable and valuable ?

The price of understanding is hard work and study. Try it.

7. I think you can probably have a simple explanation or a full explanation but probably not both together.

I think the main point to grasp is that the speed of light is constant and cannot be exceeded. This means that quantities like mass and time are not constant and can vary. Time passes at different rates depending on the speed of the observer.

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