Gravitational Waves are assumptions from the curious minds ever, Albert Einstein. They are the ripples caused in space-time sheet due to the motion of masses . Gravitational waves are produced whenever masses accelerate, changing the distortion of space-time fabric. Everything with mass and /or energy can cause ripples. As gravitational waves rolls by it will squeeze and stretch anything in its path but in a very infinitesimally small change which makes it extremely difficult to detect. So to detect these ripples we use the idea of the time taken by the light to travel is more when the distance increases and less when distance decreases, which is what the principle used in the interferometer. Thus LIGO experiment comes into the picture. LIGO - Laser Interference Gravitational-wave Observatory. Here 4km long tunnels are set up where lasers are used to measure the change in distance between the ends of the tunnels. So when Gravitational wave ...
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