What are Gravitational Waves?
Gravity is a curve in a surface called Space-time. Gravitational Waves are the disturbance in the curvature of Space-time generated by accelerated masses and propagate as wave outward from their source at the speed of light. Gravity is the force that any two objects pull together. The object which has more mass its gravitational pull stronger. Every mass in the universe has an effect on every other mass no matter how small, then changes of gravity can tell about what those objects are doing.
Variation in the gravity coming from the Universe are called gravitational waves. A mass in space creates a depression in space-time and a massive sphere rolling across a depression will curve like it's being attracted to the other mass. The bigger mass creates deeper depression and stronger gravity. When the mass making the depression moves that sends out waves in space time, these are gravitational waves.
Suppose two massive black holes are pulling each other, now one of them becomes more massive then it will pull more the other and once they will make a collision and will merge into single black hole when the collision will happen then there will create some disturbance in the space-time and will vibrate the space-time by waves it is also the example of Gravitational wave.
Pic courtesy: www.wikipedia.org
On September 14, 2015 two black-holes were collided. they had been orbiting each other by millions of years, as they got closer they circled each other faster and faster, finally the collision between them happened and they merged and became into a more massive and bigger one. A fraction of a second before their crash they sent a vibration across the universe at the speed of light and billion of years later it was detected by LIGO ( Laser Interferometer Gravitational-Wave Observatory) on the Earth.
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Great knowledge thanks
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DeleteHi, So does Earth create gravitational waves as it moves through space time on its orbit of the sun ? If so, do you think it would be possible for the gravitational wave of the Earth (which i imagine to be fairly constant in frequency and amplitude) to be affected by earthquakes ? Thanks
ReplyDeleteActually high massive star can create the disturbance. I think mass of the Earth is not enough to make waves. If Earth creates gravitational waves then it will be very small and weak.
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