Space-Time And The Speed Of Light | Einstein's Relativity

http://facebook.com/ScienceReason ... Albert Einstein's Theory of Relativity (Chapter 3): Space-Time And The Speed Of Light

The concept of spacetime combines space and time to a single abstract "space", for which a unified coordinate system is chosen. Typically three spatial dimensions (length, width, height), and one temporal dimension (time) are required. Dimensions are independent components of a coordinate grid needed to locate a point in a certain defined "space"

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SPACETIME

In physics, spacetime (or space-time) is any mathematical model that combines space and time into a single continuum. Spacetime is usually interpreted with space being three-dimensional and time playing the role of a fourth dimension that is of a different sort from the spatial dimensions. According to certain Euclidean space perceptions, the universe has three dimensions of space and one dimension of time. By combining space and time into a single manifold, physicists have significantly simplified a large number of physical theories, as well as described in a more uniform way the workings of the universe at both the supergalactic and subatomic levels.

In classical mechanics, the use of Euclidean space instead of spacetime is appropriate, as time is treated as universal and constant, being independent of the state of motion of an observer. In relativistic contexts, however, time cannot be separated from the three dimensions of space, because the observed rate at which time passes for an object depends on the object's velocity relative to the observer and also on the strength of intense gravitational fields, which can slow the passage of time.

• http://en.wikipedia.org/wiki/Spacetime

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GENERAL RELATIVITY

Special relativity is a theory of the structure of spacetime. It was introduced in Albert Einstein's 1905 paper "On the Electrodynamics of Moving Bodies" (for the contributions of many other physicists see History of special relativity). Special relativity is based on two postulates which are contradictory in classical mechanics:

1. The laws of physics are the same for all observers in uniform motion relative to one another (principle of relativity),
2. The speed of light in a vacuum is the same for all observers, regardless of their relative motion or of the motion of the source of the light.

The resultant theory agrees with experiment better than classical mechanics, e.g. in the Michelson-Morley experiment that supports postulate 2, but also has many surprising consequences. Some of these are:

* Relativity of simultaneity: Two events, simultaneous for one observer, may not be simultaneous for another observer if the observers are in relative motion.
* Time dilation: Moving clocks are measured to tick more slowly than an observer's "stationary" clock.
* Length contraction: Objects are measured to be shortened in the direction that they are moving with respect to the observer.
* Mass-energy equivalence: E = mc2, energy and mass are equivalent and transmutable.
* Maximum speed is finite: No physical object or message or field line can travel faster than light.

The defining feature of special relativity is the replacement of the Galilean transformations of classical mechanics by the Lorentz transformations. (See Maxwell's equations of electromagnetism and introduction to special relativity).

• http://en.wikipedia.org/wiki/Theory_of_relativity
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[AlphaCentauriFy]

Great video. Explained my theoretical physics course understandable :)

[theideagirlsays]

@kamikza0Lobby it would strangle an asteroid

[theideagirlsays]

@matakos22 i beg your pardon i'm canadian EH ;) lol

[theideagirlsays]

@MrSamySara yes theres 2 wiring problems at cern which i address in latest videos (i did some updates) and one will make neutrinos go slower than speed of light, the other.. faster.. T2K experiment 2 weeks ago mid feb 2012.. posted faster than the speed of light.. now our heads can all spin some more LOL

[matakos22]

@theideagirlsays you sure are american....such bullshit wtf ...

[TruthMovement330]

@itrsk You completely misunderstood this video, check your facts, its all true my friend.

[TruthMovement330]

For anyone who doesn't believe this all I can say is to go to Stanford University's youtube and watch the lectures on special relativity, then work your way around from there, if you're not lazy, you'll start to understand.

[humanstupidty]

I think that we have it all wrong. The universe is maybe more simple than we think or it is beyond what we will ever understand. Just like how a snail will never understand what is a sandwich. We can always look for the truth, but a 5 digit IQ genius would have to appear or if god existed, would have to reveal his most kept secrets. Personally, I think it is more simple than Einstein's relativity, that it does'nt make sense that time has a dimension. That the speed of light is like the speed o

[itrsk]

Why would time go perpendicular??

No one is changing the speed of light no matter what direction it will go.

All it does is reach for a greater distance.

[itrsk]

This is dumb. Especially with a car. 100m/h means you you will drive 100 miles in an hour. Sit in your car n drive a city..

Why don't you put a regular good all metal clock that runs without batteries on your time space ship n see if it works.

Another thing... Why would light change speed in dependence of another object movement??