Abstract
Gravitational waves are ripples in spacetime that have been created by accelerating masses. The recent detection of two black holes colliding by the Laser Interferometer Gravitational-wave Detector (LIGO) required a sensitivity to such distortions of the order of one thousandth the size of a proton. How LIGO was able to achieve such incredible sensitivities, how it is becoming even more sensitive, as well as future prospects will all be discussed.
Reading on the LIGO interferometer
https://www.ligo.caltech.edu/page/ligo-gw-interferometer
