Laser Interferometer Gravitational – Wave Observatory (LIGO) – India

Laser Interferometer Gravitational – Wave Observatory (LIGO) – India

Recently the Prime Minister has laid the foundation stone of Laser Interferometer Gravitational-Wave Observatory – India (LIGO – India).

LIGO-India is being built in Hingoli district of Maharashtra. LIGO-India is a planned Advanced Gravitational Wave Observatory. It will be located in India as part of a worldwide network of such observatories.

Origin: The project was approved “in principle” in 2016. It is targeted to be completed by 2030.

Funding: Department of Atomic Energy (DAE), and Department of Science and Technology (DST).

Functioning of LIGO –

  • The observatory comprises two vacuum chambers each 4 km long. They are made perpendicular to each other.
  • Highly reflective mirrors are installed at the end of the vacuum chambers.
  • Light rays are released simultaneously in both the vacuum chambers.
  • Under normal circumstances, the light rays from both chambers come back at the same time. Here the presence of a phase difference between the two rays indicates the presence of a gravitational wave.

Source – PIB

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