What’s speed of gravity

what experiment confirmed the existence of gravitational waves?

The first direct detection of gravitational waves was made by the Laser Interferometer Gravitational-Wave Observatory (LIGO) in 2015. This groundbreaking discovery confirmed a major prediction of Albert Einstein’s theory of general relativity and opened up a new field of astronomy, allowing us to study the universe in a completely new way. The detection was made by observing the minute distortions in space-time caused by the passage of a gravitational wave from the collision of two black holes over a billion light-years away. This discovery was widely regarded as one of the most important scientific breakthroughs of the century and has been recognized with several awards, including the 2017 Nobel Prize in Physics.

what ALL experiments have we done to detect gravitational waves?

The detection of gravitational waves has been carried out by various experiments, most notably the Laser Interferometer Gravitational-Wave Observatory (LIGO). LIGO uses laser interferometry to detect extremely small distortions in space-time caused by the passage of gravitational waves. Another experiment, the Virgo interferometer, has also detected gravitational waves. These detections have been made possible by the extremely precise measurements of the distance between mirrors, which are affected by the passing gravitational waves. The collaboration between LIGO and Virgo has allowed for more accurate localization of gravitational wave sources in the sky.

have we learned yet at what speed of gravitational waves travel?

The speed of gravitational waves is equal to the speed of light, approximately 299792458 meters per second. This has been confirmed by numerous experiments and observations, including the detection of gravitational waves from merging black holes and neutron star






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