“Gravitational Waves” found yet again!

Here’s a quick update…

Last year in september, for the first time ever scientists Laser Interferometer Gravitational-Wave Observatory (LIGO) have observed Gravitational waves. The source of these waves were the product of the collision between two black holes into a giant single black hole occured 1.3 billion light years away

On December 16 2015 LIGO observatory for the second time detected a signal, which now confirmed as Gravitational waves. The scientists at LIGO converted these gravitational waves into sound waves, here’s how they sound!

This yet again proves the Einsteins theory of relativity..
When two dense objects such as neutron stars or black holes orbit each other, space-time is stirred by their motion and gravitational energy ripples throughout the universe.

 Learn more from my previous articles about”Gravitational waves?“, “First ever discovery of gravitational waves“, and “Origin of our universe“!!

 

Epic moment in science( Discovery of Gravitational Waves)

For so long, scientists were trying hard to find the evidence for Gravitational waves, predicted by Einstein over a 100 years ago, in his “Theory of Relativity”. Finally, scientists at LIGO( Laser Interferometer Gravitational Waves Observatory) detected Gravitational Waves.

Scientists estimate, about 1.3 billion years ago, two black holes  collided at half the speed of light. Which resulted in Gravitational waves. Detector at LIGO detected these waves.

LIGO has two identical detectors, one located in Livingston, Louisiana, the other in Hanford, Washington. These Detectors can detect even very little vibrations from Gravitational Waves.

Learn more about gravitational waves here”Gravitational Waves“. Also about the origin of our universe, cosmic inflation here” Origin of our universe“.

This discovery changes our perspective on how we see the Universe.

Gravitational Waves?

 When we wiggle a charge we get electromagnetic radiation, similarly if we wiggle a mass we get gravitational waves. These Gravitational waves are extremely weak, it is tough to detect them.

As the above video shows, When large masses move suddenly, some of this space-time curvature ripples outward. When two dense objects such as neutron stars or black holes orbit each other, space-time is stirred by their motion and gravitational energy ripples throughout the universe.

 Laser Interferometer Gravitational-Wave Observatory (LIGO) is the one which detect the ripples in space-time by using a device called a laser interferometer.

You probably heard something called “Gravitational waves have quantum origin”, which means, around the time of big bang, there are some particles called “Gravitons” as the universe expanded the gravitons got stretched and now we call then Gravitational waves.

Albert Einstein predicted Gravitational waves as a part of General Relativity in 1916. And we found the foot prints of Gravitational waves in recent years while trying to know the origin of our Universe (learn more about origin of our universe here Origin of our universe).

 

 

ORIGIN OF OUR UNIVERSE!!! GRAVITATIONAL WAVES AND COSMIC INFLATION!!

Damn the cosmology is confusing yet extremely interesting. Before we get deeper, checkout the picture of our universe after 380,000 years of big bang… Wondering where did we get this baby picture of our universe? Let’s talk from the start.

universe-age

Our universe after 380,000 years of the big bang was so hot that all the subatomic particles like protons, electrons were in a state of plasma moving randomly, even light passing through, was scattered or absorbed, which means the whole universe was opaque. After 380,000 years when the universe was cooled and expanded the electrons and protons are combined and formed hydrogen atoms. So finally after moving randomly for 380,000 years, the photon started to move in space for 13.8 billion years not hitting anything until they reached our detector. This is how, we got this baby image of our Universe.

These photons which started as blue light or visible radiation ended up as microwaves by the time they reached us. These reached us by accident, the first picture was detected by two scientists working on something else and found these signals by accident, but the thing is the image was extremely symmetric. After some advancements in telescopes we finally got the picture shown above.

But the non uniformity is important, due to which there are more dense and less dense places, the higher dense places pull the matter around them. And the massive structures like galaxies are made of this.

So, how could we explain this uniformity, which we first encountered? Well… Scientists have proposed a theory called INFLATION which states that right after the big bang, all of a sudden the universe expanded rapidly. It was said that the time taken was trillionth of a trillionth of a trillionth of a second.

So, how could we prove this freaking theory Inflation? Because, we couldn’t find the light before 138,000 years big bang… May be we couldn’t detect the light but we can detect something else so called ” Gravitational wave “… It is like when we viggle a charge we get electromagnetic radiation, similarly if we viggle a mass we get gravitational waves. These Gravitational waves are extremely weak, it is tough to detect them. If the Inflation really took place and the expansion took place so rapidly and the gravitational waves from that moment would stretch and squeeze all the matter of the early universe.

To do this we need to record the polarization of light on the image we get. That is what the scientists exactly got. This is one of the more precious discoveries in the field of science.

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This was the most tough article I wrote, since I started blogging…. Please let me know, what do you think of it….

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