Gravitational wave detectors are advanced scientific instruments designed to observe ripples in spacetime caused by massive cosmic events, such as the collision of black holes or neutron stars. These waves travel at the speed of light and can provide valuable information about the universe's most energetic phenomena. The most well-known gravitational wave detectors are LIGO (Laser Interferometer Gravitational-Wave Observatory) and Virgo. They use laser beams and mirrors to measure tiny changes in distance caused by passing gravitational waves, allowing scientists to study the properties of these events and enhance our understanding of general relativity and the universe.