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Date : 2013-04-08
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Spacetime Wikipedia ~ In physics spacetime is any mathematical model that fuses the three dimensions of space and the one dimension of time into a single fourdimensional continuum Spacetime diagrams can be used to visualize relativistic effects such as why different observers perceive where and when events occur differently
Understanding gravity—warps and ripples in space and time ~ Gravity is the curvature of spacetime The equivalence principle tells us that the effects of gravity and acceleration are indistinguishable In thinking about the example of the cylindrical ride we see that accelerated motion can warp space and time It is here that Einstein connected the dots to suggest that gravity is the warping of space
Relativity Curved spacetime and geometric gravitation ~ Relativity Relativity Curved spacetime and geometric gravitation The singular feature of Einstein’s view of gravity is its geometric nature See also geometry The real world Whereas Newton thought that gravity was a force Einstein showed that gravity arises from the shape of spacetime While this is difficult to visualize there is an analogy that provides some insight—although
How Gravity Changes Time The Effect Known as ~ The explanation comes down to what scientists call Gravitational Time Dilation This effect measures the amount of time that has elapsed between two events by observers at different distances from a gravitational mass In other words time runs slower wherever gravity is strongest and this is because gravity curves spacetime
GPB — Einsteins Spacetime Gravity Probe B ~ Gravity feels strongest where spacetime is most curved and it vanishes where spacetime is flat This is the core of Einsteins theory of general relativity which is often summed up in words as follows matter tells spacetime how to curve and curved spacetime tells matter how to move
SpaceTime Relativity Quantum Physics and Quantum Gravity ~ Spacetime does not evolve it simply exists When we examine a particular object from the stand point of its spacetime representation every particle is located along its worldline This is a spaghettilike line that stretches from the past to the future showing the spatial location of the particle at every instant in time
Why would spacetime curvature cause gravity ~ Spacetime in gravitation field is curved so the time axis in simple terms is no longer orthogonal to the space axes The apple moving first only in the time direction at rest in space starts accelerating in space thanks to the curvature the mixing of the space and time axes the velocity in time becomes velocity in space
Gravitational time dilation Wikipedia ~ Gravitational time dilation is a form of time dilation an actual difference of elapsed time between two events as measured by observers situated at varying distances from a gravitating mass The lower the gravitational potential the closer the clock is to the source of gravitation the slower time passes speeding up as the gravitational
Einsteins Theory of General Relativity A Simplified ~ Albert Einstein determined that massive objects cause a distortion in spacetime which is felt as gravity This formed the basis of this theory of general relativity
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