Gravitational waves


Story behind gravitational wave.
September 14, 2015 at 6 O'clock a.m in the morning scientist witnessed something that no human had ever experienced, that is the two Black Holes colliding to each other both 30 times as massive as a the Sun. They were orbiting each other for millions of years as they come close to each other they got faster and faster finally they collided and immersed into a single but even a bigger black hole. A fracion of second before the crash they sended the  vibrations across the universe at the speed of light and on Earth. Millions of years later a detector called l i g o picked that up and that was the first ever detection of gravitational waves in the history of human kind.

 What are gravitational waves?

Gravitational waves are disturbances in the curvature of spacetime, generated by accelerated masses, that propagate as waves outward from their source at the speed of light. They were proposed by Henri Poincaré in 1905 and subsequently predicted in 1916 by Albert Einstein on the basis of his general theory of relativity

 Who is the character behind this idea?

Albert Einstein in 1916 suggested that the gravitational wave can be an outcome of his general theory of relativity, which says that every massive object is distort the time and space fabric namely Gravity.

 Why it is so hard to detect it?

Gravitational waves that reaches us from distant events that spawn them they distort everything that come under its influence. the distortion is so minute, even less than width of the Proton. hence it became pretty much impossible for most instruments to detect it.


 What is LIGO?
LIGO is made up of two observatories: one in Louisiana and one in Washington (above). Each observatory has two long “arms” that are each more than 2 miles (4 kilometers) long. Credit: Caltech/MIT/LIGO Lab

The Laser Interferometer Gravitational-Wave Observatory (LIGO) is a large scale physics experiment and observatory to detect cosmic gravitational waves and to develop gravitational-wave observations as an astronomical tool.