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GS Paper IUPSC Prelims 2015
Space & ISRO
Question No. 112Interactive Test Mode
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Q112. In the context of modern scientific research, consider the following statements about ‘IceCube’, a particle detector located at South Pole, which was recently in the news: 1. It is the world’s largest neutrino detector, encompassing a cubic kilometer of ice. 2. It is a powerful telescope to search for dark matter. 3. It is buried deep in the ice. Which of the statements given above is/are correct?

In the context of modern scientific research, consider the following statements about ‘IceCube’, a particle detector located at South Pole, which was recently in the news:

  1. It is the world’s largest neutrino detector, encompassing a cubic kilometer of ice.
  2. It is a powerful telescope to search for dark matter.
  3. It is buried deep in the ice. Which of the statements given above is/are correct?
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 2015 • Science and Technology

Correct Answer: Option (D) — 1, 2 and 3

Concept & Option Breakdown

Standard Reference Verified

Statement 1 is correct: The IceCube Neutrino Observatory encompasses one cubic kilometer of clear Antarctic ice instrumented with optical sensors.

Statement 2 is correct: By observing neutrinos produced by dark matter annihilation (such as WIMPs interacting in the Sun or galactic core), IceCube serves as an indirect telescope searching for dark matter.

Statement 3 is correct: IceCube's optical sensors are buried at depths between 1,450 and 2,450 meters below the surface to shield them from surface cosmic-ray background noise.

Elimination Heuristic & Exam Approach

All three statements accurately capture the physical design, operational mechanism, and scientific research goals of the IceCube observatory.

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Question Specifications & Syllabus Mapping

Examination & YearUPSC Civil Services Preliminary Examination 2015 (Q112)
Paper & Marking SchemeGS Paper I • 2 Marks (-0.66 Negative for incorrect response)
Syllabus Subject & TopicScience and Technology → Space & ISRO
Official Answer KeyOption (D) — 1, 2 and 3

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Frequently Asked Questions — UPSC Prelims 2015 Q112

What is the official answer for UPSC Prelims 2015 GS Paper I Question 112 (Science and Technology)?

The official UPSC answer key for this 2015 Science and Technology (Space & ISRO) question is Option (D): "1, 2 and 3". Correct attempts carry 2 Marks with -0.66 Negative penalty for wrong answers.

Which UPSC Prelims syllabus topic does this 2015 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?

All three statements accurately capture the physical design, operational mechanism, and scientific research goals of the IceCube observatory.

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