Recently, scientists observed the merger of giant 'blackholes' billions of light-years away from the Earth. What is the significance of this observation?
Show answer
Answer: B. When two black holes merge, they send out ripples in space-time called gravitational waves. LIGO first detected these in 2015 (announced 2016), confirming Einstein's prediction.
Watch for: 'Singularity' sounds linked to black holes, which tempts students to pick D.
Why the other options are wrong
- A. Wrong because the Higgs boson was found at CERN's particle collider, not from black holes.
- C. Wrong because wormhole travel has not been confirmed.
- D. Wrong because the observation did not reveal what happens at the singularity.
Source to check: LIGO Scientific Collaboration (ligo.org) announcement, February 2016; Department of Science and Technology, LIGO-India project
Answer from the official UPSC key. Written and fact-checked by AI against the official key. Spotted a mistake? Report it.