Question

what is gravitational waves​

Answer 1

Here Is Your Answer

A gravitational wave a concept predicted by Einstein's theory of general relativity.

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. 

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Answer 2

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Gravitational waves is an energy-carrying wave propagating through a gravitational field, produced when a massive body is accelerated or otherwise disturbed. Gravitational waves were first postulated by Einstein in 1916 and were first observed directly in September 2015.

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