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Discovery of the neutron-star-merger system

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The LIGO discovery of the neutron-star-merger system GW170817 gave an opportunity to measure the speed of gravitational waves (GWs), because the discovered event had both a light signal (a flash) and a GW signal (a chirp). Look up the distance to this event. Now imagine that GWs travel more slowly than the speed of light. How much slower than the speed of light would GWs have to travel for the two signals to arrive at Earth separated by 10 seconds?

Reference no: EM132423804

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