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GS Paper IUPSC Prelims 2017
Space & ISRO
Question No. 109Interactive Test Mode
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+2-0.66

Q109. What is the purpose of the ‘evolved Laser Interferometer Space Antenna (eLISA)’ project?

What is the purpose of the ‘evolved Laser Interferometer Space Antenna (eLISA)’ project?

Select the correct option below (or cross out options to eliminate)
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Official Answer Key & Detailed Solution

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Official UPSC Answer KeyUPSC Prelims 2017 • Science and Technology

Correct Answer: Option (B) — To detect gravitational waves

Concept & Option Breakdown

Standard Reference Verified

Option B is correct: The evolved Laser Interferometer Space Antenna (eLISA) is a space-based gravitational wave observatory led by the European Space Agency (ESA) designed to measure ripples in spacetime produced by cosmic events such as supermassive black hole mergers.

Elimination Heuristic & Exam Approach

Associate 'LISA' (Laser Interferometer Space Antenna) directly with gravitational wave detection, analogous to ground-based 'LIGO'.

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Question Specifications & Syllabus Mapping

Examination & YearUPSC Civil Services Preliminary Examination 2017 (Q109)
Paper & Marking SchemeGS Paper I • 2 Marks (-0.66 Negative for incorrect response)
Syllabus Subject & TopicScience and Technology → Space & ISRO
Official Answer KeyOption (B) — To detect gravitational waves

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Frequently Asked Questions — UPSC Prelims 2017 Q109

What is the official answer for UPSC Prelims 2017 GS Paper I Question 109 (Science and Technology)?

The official UPSC answer key for this 2017 Science and Technology (Space & ISRO) question is Option (B): "To detect gravitational waves". Correct attempts carry 2 Marks with -0.66 Negative penalty for wrong answers.

Which UPSC Prelims syllabus topic does this 2017 question belong to?

This question belongs to GS Paper I under the subject "Science and Technology" and micro-topic "Space & ISRO". You can explore all repeated questions from Space & ISRO in Acme AI's 3D Prelims PYQ Realm or practice 50 full-length and sectional tests in the APT Prelims Test Series.

How can I solve this Space & ISRO UPSC Prelims question using option elimination?

Associate 'LISA' (Laser Interferometer Space Antenna) directly with gravitational wave detection, analogous to groundbased 'LIGO'.

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