Is Einstein's Theory of Relativity true?

A team of researchers is expected to announce during a press conference the discovery of gravitational waves according to #Space.com. These mysterious gravitational waves are those wave pulses that occur in the space-time texture of a cvatridmensional content. The existence of these gravitational waves was previewed by Albert Einstein in his famous theory of relativity from 1916.

More accurate, the gravitational waves are fluctuations in the space-time curvature that spread like waves. We can see them, for example, by boat on a quiet lake and we notice that the surface of the water forms small waves that accompany us in the direction we travel.

According to Einstein, the same thing happens when heavy objects are moving through space-time. The Relativity Theory says that space is not a vacuum (as previously believed) but rather a four-dimensional material that can be pulled or pushed by cosmic objects moving through it. The gravitational attraction is caused by the distortion generated in space-time, according to the same theory.

Rubber membrane to explain the theory

A great way used to explain this is the stretching of a rubber membrane in the air, mounted on pilling. If we place on this membrane a hard object such as a bowling ball, we will notice immediately that the ball generates a hollow. If we put a lighter ball on the same rubber membrane then -- like a billiard ball -- we will see that the ball willl be attracted to the hollow made by the heavier ball and it will "fall" toward it. In the same way, our planet "falls" to the Sun because it generates the same kind of space-time distortion. Thus, our planet is supported at orbital distance by a hollow created in the cosmic texture by its own weight.

The analogy with the rubber membrane (even if it's not an exact one) can help us understand how gravitational relationships between large cosmic objects work. Thus, we can imagine cosmic space as a "dynamic substance" instead of as a vacuum. So, all the objects that move through the cosmic space generate waves around them. The waves created by smaller celestial bodies disappear quickly. Instead, supermassive cosmic objects -- such as black holes or neutron stars -- generate waves strong enough to be detected from Earth with the help of a detection system.

One of the experiments currently performed to identify those gravitational waves is Laser Interferometer Gravitational-Wave Observatory (LIGO). In the experiment, a team of researchers look for these waves by watching how they affect the space-time texture: when a wave passes it stretches the space in one direction and it spreads it in front of it, on a perpendicular direction. The discovery of gravitational waves opens up new ways to observe the Universe. For example, the primordial gravitational waves generated by the Big Bang explosion will give us valuable information about the formation of the Universe.

Extremely strong gravitational waves are formed, for example, when two black holes are born and they collide and when stars in the supernova stage are exploding. Concrete evidence of the existence of gravitational waves would open a new era for subjects such as physics or astronomy (and might help physicists explain the fundamental laws of the Universe itself).

#Science #Buzz