# The Naked Scientists Forum

### Author Topic: Einstein's Theory of Relativity?  (Read 2681 times)

#### The Scientist

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##### Einstein's Theory of Relativity?
« on: 17/01/2011 14:45:31 »
What is Einstein's Theory of Relativity? Please explain the basics with examples. I've read on it and found myself not being able to fully understand the theory. Especially the part where travelling faster will have an increase of mass and decrease in length. What do you think?

#### QuantumClue

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##### Einstein's Theory of Relativity?
« Reply #1 on: 17/01/2011 15:52:07 »
The relativistic theory is a theory of moving clocks. It is a theory on how things in the universe have frames of reference, and how those frames of reference are in relation to other frames of reference. The special theory of relativity is primarily about moving observers.

The General Theory of relativity draws relativistic relationships on matter, energy, acceleration and curvature. The general theory draws its speculations on reality as a direct consequence of the special theory. The General theory however, see's moving clocks quite differently. Eventually you will run into equations which show that moving clocks dissappear. This means that matter fields vanish, and all you are left with is an immutable energy field which does not change in time.

#### QuantumClue

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##### Einstein's Theory of Relativity?
« Reply #2 on: 17/01/2011 15:53:57 »
The reason why energy increases with speed, is a direct consequence of the relativistic equations, I could make a writeup on this if you wanted to help you understand. In a nutshell, objects use energy to accelerate, and the more you accelerate a particle to the universal speed of ''c'' (lightspeed) energy reaches infinity. In theory, it is impossible to accelerate a particle to lightspeed - only particles devoid of inertial matter can move at this speed.

#### The Scientist

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##### Einstein's Theory of Relativity?
« Reply #3 on: 19/01/2011 12:28:14 »
What about the part where E=mc2? The part which is about moving fast will make your mass increase and the length shorter? Thanks!

#### simplified

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##### Einstein's Theory of Relativity?
« Reply #4 on: 19/01/2011 16:56:25 »
E=mc˛  - this formula is right if:
1)E - is potential energy only for own inertial system
m - gravitation mass

2)E - kinetic energy
m -a turned mass into energy

#### Soul Surfer

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##### Einstein's Theory of Relativity?
« Reply #5 on: 19/01/2011 23:48:12 »
The most important thing about the theory of relativity is that it deals with how things look somewhere else and moving differently than where you are.  Where you are and for things standing still near you  (or things round  the person who is where you are looking at from the point of view of that person)  everything looks perfectly normal in space and time.  This is the unspectacular bit about relativity that no one ever bothers to mention.

#### JP

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##### Einstein's Theory of Relativity?
« Reply #6 on: 20/01/2011 00:25:45 »
The most important thing about the theory of relativity is that it deals with how things look somewhere else and moving differently than where you are.  Where you are and for things standing still near you  (or things round  the person who is where you are looking at from the point of view of that person)  everything looks perfectly normal in space and time.  This is the unspectacular bit about relativity that no one ever bothers to mention.

That's funny because "things looking normal" is built into the foundations of special relativity.  The postulates are that the laws of physics are the same for everyone in an inertial reference frame.  Those laws include the speed of light being constant, which causes all the funny effects when comparing moving observers.

#### yor_on

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##### Einstein's Theory of Relativity?
« Reply #7 on: 21/01/2011 15:40:25 »
That's the really equivalent bit too :)
That everything will be exact the same for you, no matter where you are or what you do. It makes me wonder if you others really exist in fact?

Do you?

Prove it :)
« Last Edit: 21/01/2011 17:35:06 by yor_on »

#### The Naked Scientists Forum

##### Einstein's Theory of Relativity?
« Reply #7 on: 21/01/2011 15:40:25 »