- PM recently laid down the foundation stone of Laser Interferometer Gravitational-Wave Observatory – India (LIGO-India).
- The LIGO-India facility is being constructed in Hingoli district in Maharashtra.
- LIGO – India is a planned advanced gravitational- wave observatory to be located in India as part of the worldwide network.
- The project was given “in principle” approval in 2016 to be completed by 2030.
| Operational LIGOs Besides the United States (in Hanford and Livingston), such gravitational wave observatories are currently operational in Italy (Virgo) and Japan (Kagra). |
- Funding by Department of Atomic Energy (DAE) and the Department of Science and Technology (DST).
- It will be the fifth node of the planned network and will bring India into a prestigious international scientific experiment.
WORKING MECHANISM OF LIGO
- The observatory comprises two 4-km-long vacuum chambers, built perpendicular to each other with highly reflective mirrors at the ends.
- Light rays are released simultaneously in both vacuum chambers.
- In normal circumstances, the light rays in both chambers would return simultaneously.
- However, if a gravitational wave arrives, one chamber gets elongated while the other gets squished, causing a phase difference in the returning light rays.
- Detecting this phase difference confirms the presence of a gravitational wave.
SCIENTIFIC BENEFITS OF LIGO INDIA
- The LIGO-India project would have several spin-off benefits to Indian science.
- The observatory is expected to enable dramatic returns in astronomy and astrophysics, as well as leapfrog Indian science and technology in cutting-edge frontiers of great national relevance.
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