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Title: Einstein's Theory Of Relativity Made Easy
Added: Jul 28, 2010
Author: ScienceTV
Duration: 8:30
Description:
http://facebook.com/ScienceReason ... Albert Einstein's Theory of Relativity (Chapter 1): Introduction.The theory of relativity, or simply relativity, encompasses two theories of Albert Einstein: special relativity and general relativity. However, the word "relativity" is sometimes used in reference to Galilean invariance.The term "theory of relativity" was coined by Max Planck in 1908 to emphasize how special relativity (and later, general relativity) uses the principle of relativity.---Please subscribe to Science & Reason:• http://www.youtube.com/Best0fScience• http://www.youtube.com/ScienceMagazine• http://www.youtube.com/ScienceTV• http://www.youtube.com/FFreeThinker---SPECIAL RELATIVITYSpecial 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).---GENERAL RELATIVITYGeneral relativity is a theory of gravitation developed by Einstein in the years 1907--1915. The development of general relativity began with the equivalence principle, under which the states of accelerated motion and being at rest in a gravitational field (for example when standing on the surface of the Earth) are physically identical. The upshot of this is that free fall is inertial motion; an object in free fall is falling because that is how objects move when there is no force being exerted on them, instead of this being due to the force of gravity as is the case in classical mechanics.This is incompatible with classical mechanics and special relativity because in those theories inertially moving objects cannot accelerate with respect to each other, but objects in free fall do so. To resolve this difficulty Einstein first proposed that spacetime is curved. In 1915, he devised the Einstein field equations which relate the curvature of spacetime with the mass, energy, and momentum within it.Some of the consequences of general relativity are:• Time goes slower in higher gravitational fields. This is called gravitational time dilation.• Orbits precess in a way unexpected in Newton's theory of gravity. (This has been observed in the orbit of Mercury and in binary pulsars).• Rays of light bend in the presence of a gravitational field.• Frame-dragging, in which a rotating mass "drags along" the space time around it.• The Universe is expanding, and the far parts of it are moving away from us faster than the speed of light.Technically, general relativity is a metric theory of gravitation whose defining feature is its use of the Einstein field equations. The solutions of the field equations are metric tensors which define the topology of the spacetime and how objects move inertially.• http://en.wikipedia.org/wiki/Theory_of_relativity---The Cassiopeia Project - making science simple!The Cassiopeia Project is an effort to make high quality science videos available to everyone. If you can visualize it, then understanding is not far behind.• http://www.cassiopeiaproject.com.
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Channel: Film
Tags: einstein theory of special general relativity introduction space time physics principle relative motion mass energy equivalence e=mc2 speed light mechanics gravitation dilation newton universe
einstein theory of special general relativity introduction space time physics principle relative motion mass energy equivalence e=mc2 speed light mechanics gravitation dilation newton universe
Youtube Comments: 384
quiz0walkthroughs Says:
Apr 14, 2012 - ITS KM/H NO M/H lol, if only..
RUNERuuub Says:
Apr 14, 2012 - I'd do Sarah
AnthraxSK Says:
Apr 19, 2012 - I hope this is a retarded simplified version of what Einstein invented because otherwise i dont really think he was thát smart :P i could've figured this out? i mean i have figured this out without reading into it :P there must be more to it... right?
AnthraxSK Says:
Apr 19, 2012 - discovered*
jackson kidd Says:
Apr 19, 2012 - That explains why if you were to hang on to the back of the truck you would move at the same speed but if you let go you would shoot back and lose all the speed.
funnyav Says:
Apr 21, 2012 - echoes >__<
gr0ove Says:
Apr 22, 2012 - Well if you are so smart, figure it out :P...Of course we know the simple parts about adding up the total MPH but did you completely understand how the satellites triangulate? Look up triangulation on wikipedia
israelsocratus Says:
Apr 29, 2012 - ' On the Electrodynamics of moving Bodies ' / SRT / Einstein wrote about moving of ' Electrodynamics Bodies' It means he wrote about particles like light quanta, electronOne of postulate says that quantum of light moves with constant speed The other postulate says that every movement / speed, even the speed of light quantum, is relativeConclusion The essence of SRT is hidden in question: What will be happen if quantum of light changes its constant movement ?
StormLogic Says:
Apr 30, 2012 - Einstein did not postulate that the speed of the light quantum is relative - he postulated the exact opposite: that the speed of the light quantum is absolute, that it does not depend on the relative speed of the source and the observer.
GluttonForSex Says:
May 3, 2012 - This is relevant to my sense of time.
rlui123 Says:
May 6, 2012 - if this is too simple for you then search for video Relativity Lecture 10, once you get the hang of the math then come back explain it to us all
nbobralla16 Says:
May 13, 2012 - THE BACKGROUND MUSIC IS KILLING ME.
fuckthatsonofabitch Says:
May 14, 2012 - relative to what?:)
egadw Says:
May 15, 2012 - So wonderful is the word of God
Emmylou2u Says:
May 15, 2012 - Seriously? Its barbaric.
egadw Says:
May 16, 2012 - You are created in his image, to say it is barbaric is saying you are barbaric.
Emmylou2u Says:
May 16, 2012 - Pfft. Says you. Where is your proof? Oh, right, there is none. Just a barbaric antiquated book supposedly written by people who were illiterate goat herders.
egadw Says:
May 16, 2012 - Faith requires no proof.
egadw Says:
May 16, 2012 - As if proof is needed. I don't buy into your propaganda.
Emmylou2u Says:
May 16, 2012 - A shame. As if proof isn't needed? Who believes in anything without proof? Only a fool.
Alexxor Trollington Says:
May 17, 2012 - watches for a few minutes>.< ugh doesnt explainsearches for big bang vidsuccess :D
jezmundberserker Says:
May 20, 2012 - She's a hottie, though.
LarryWagner1957 Says:
May 20, 2012 - I'd like to know your thoughts on my thoughts on relativity as I've expressed them in this 8 minute video. Maybe I'm over-simplifying the issue, but to me, it appears that there is a very basic and obvious flaw in the theory. You can find it on Youtube under "Relativity Outside the Box Part 1" Thanks Larry
SixPackForSure Says:
May 23, 2012 - @egadw And you deny that we ARE barbaric? How could you say we are not? We may have gotten more intelligent since our caveman days (and don't say you deny our evolution) but we are still very much barbaric. I mean look at us fighting each other, raping and pillaging the land for food and resources for our own selfish gains, the only difference is now we have the intelligence to convince ourselves and each other that we are not acting barbaric, we are but civilized images of God.
bazingabye Says:
Apr 13, 2012 - @yankeegohome because there is a cosmic speed limit, the laws os physics prevent you from traveling above that speed. You could only get close to that perfect speed, but never above it. By getting close to that speed the laws of physics would slow time down there for warping time, and there for creating a time machine.If you where a passenger, you would only experience one week (at that speed) when in real time, 100 years would have passed.