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UPSC Prelims 2020 Paper-1 📅 04 Oct, 2020

"The experiment will employ a trio of spacecraft flying in formation in the shape of an equilateral triangle that has sides one million kilometres long, with lasers shining between the craft." The experiment in question refers to

A
Voyager-2
B
New Horizons
C
LISA Pathfinder
D
Evolved LISA
Result Summary
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UPSC Prelims
2020 • 04 Oct, 2020 • Paper-1
"The experiment will employ a trio of spacecraft flying in formation in the shape of an equilateral triangle that has sides one million kilometres long, with lasers shining between the craft." The experiment in question refers to
Correct Answer
Evolved LISA
Mission Concept Description: The description precisely outlines the foundational architecture of the Laser Interferometer Space Antenna (LISA) mission, specific......
Ref/Book : UPSC Prelims 2020
Ref. Subject Science & Technology
Chapter -
Ref. Topic Space Technology
Pg. No -
💡 Analysis & Explanation
Mission Concept Description ▼
The description precisely outlines the foundational architecture of the Laser Interferometer Space Antenna (LISA) mission, specifically its evolved version (eLISA).
Detection Mechanism ▼
Designed by the European Space Agency (ESA), its primary goal is to detect and observe gravitational waves directly from space. It involves three spacecraft placed in a massive triangular formation, linked by highly precise laser beams to measure minute spatial distortions caused by passing gravitational waves.
Contrast with Alternatives ▼
Voyager 2 and New Horizons are deep-space planetary exploration probes. LISA Pathfinder was merely a smaller, single-spacecraft proof-of-concept mission launched to test the technology, not the million-kilometer trio itself.
Conclusion ▼
The description uniquely and perfectly matches the Evolved LISA project.
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