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UPSC 2019: Recently, scientists observed the merger of giant 'blackholes' billions of light-years away from the Earth. What is the significance of this observation?
(a)'Higgs boson particles' were detected.
(b)'Gravitational waves' were detected.
(c)Possibility of inter-galactic space travel through 'wormhole' was confirmed.
(d)It enabled the scientists to understand 'singularity'.
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Not attemptedCorrect Answer: (b) 'Gravitational waves' were detected.
When two massive black holes spiral together, part of their mass–energy is emitted as ripples in space-time called gravitational waves; the 2015 LIGO observation (and subsequent events such as GW190521) confirmed this. The merger did not produce Higgs bosons, prove wormholes, or resolve singularity physics. Thus the key significance is the detection of gravitational waves, option (b). ([edukemy.com](https://edukemy.com/blog/upsc-prelims-2019-question-97/?utm_source=openai))
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Frequently Asked Questions
What is the correct answer to this UPSC 2019 Science & Technology question?▼
The correct answer is option (b): 'Gravitational waves' were detected.. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
Which year was this Space Technology & Astronomy question asked in UPSC Prelims?▼
This question was asked in UPSC CSE Prelims 2019, GS Paper 1, as Question 97. It falls under Science & Technology > Space Technology & Astronomy.
What is the difficulty level of this UPSC question?▼
This question is rated "easy". It tests basic recall and most well-prepared aspirants should answer it correctly.
How many UPSC Prelims questions have been asked from Space Technology & Astronomy?▼
UPSC has asked 69 questions from Space Technology & Astronomy (under Science & Technology) across multiple years. Visit the topic page to see the full list and year-wise trends.