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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 kilometre 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?
Explanation
All three statements about IceCube are correct.
IceCube is the world's largest neutrino detector[2], and it is a cubic-kilometer particle detector made of Antarctic ice located near the Amundsen-Scott South Pole[4]. This confirms statements 1 and 2 about its size and status.
DeepCore, a specialized array within IceCube, is used to facilitate searches for dark matter[5], validating statement 2 about its capability as a telescope for dark matter research.
The detector is buried to a depth of about 2.5 km in the Antarctic ice[6], and it extends from a depth of 1.45 km to 2.45 km[7], confirming statement 3 about it being buried deep in the ice.
Therefore, all three statements are accurate, making option D the correct answer.
Sources- [1] https://www.sciencedirect.com/science/article/abs/pii/S0273117711003231
- [3] https://icecube.wisc.edu/science/icecube/
- [4] https://gcn.nasa.gov/missions/icecube
- [5] https://www.sciencedirect.com/science/article/abs/pii/S0273117711003231
- [6] https://www.sciencedirect.com/science/article/abs/pii/S0168900213014654
PROVENANCE & STUDY PATTERN
Guest previewThis is a classic 'Big Science' current affairs question. It rewards tracking major global scientific milestones (like CERN, LIGO, IceCube) rather than textbook reading. If a facility breaks a record ('World's Largest') or offers a unique engineering marvel (buried in ice), it becomes high-priority for Prelims.
This question can be broken into the following sub-statements. Tap a statement sentence to jump into its detailed analysis.
- Directly states IceCube is a cubic-kilometer particle detector.
- Specifies the detector is made of Antarctic ice and located at the South Pole.
- Describes IceCube as a cubic-kilometer Cherenkov particle detector deployed in Antarctic ice beneath the Amundsen-Scott South Pole Station.
- Explicitly says the array instruments a cubic-kilometer of ice.
- Refers to instruments buried in a cubic kilometer of Antarctic ice to detect neutrino signals.
- Supports the description of IceCube's instrumented volume being one cubic kilometer.
Gives the enormous areal scale of Antarctica (14 million km² and 90% of terrestrial ice), showing the continent contains vast amounts of ice volume.
A student could combine this large area with a plausible range of ice thickness (from basic external maps/ice-thickness data) to judge whether a 1 km³ instrumented volume is a tiny fraction and therefore physically plausible on the continent.
States Antarctica is covered by a single enormous ice sheet and describes coastal ice-shelf features, indicating substantial continuous ice suitable for in-ice detectors.
One could use the concept of a continuous ice sheet to infer that drilling/embedding instruments into a contiguous block of ice of order cubic kilometres is feasible given typical ice-sheet extents.
Reports very large iceberg/shelf fragment sizes (example: 11,000 km² iceberg), illustrating the scale at which Antarctic ice exists in contiguous volumes/areas.
Comparing an 11,000 km² area (from snippet) to the 1 km³ volume, a student could note that even modest ice thicknesses across small areas easily yield cubic-kilometre volumes, supporting plausibility.
Defines Antarctica geographically (land and ice-shelves south of 60°S) and notes it is designated a scientific reserve, implying major scientific installations are sited there.
Knowing the South Pole lies within this region, a student could combine the treaty's emphasis on science with maps to locate where a large ice-based detector might be placed on the Antarctic ice sheet.
Describes the ice-cap climate of interior Antarctica where temperatures remain below freezing and snow/ice accumulate into thick ice sheets.
Using the idea of thick, persistent interior ice, a student could infer that drilling or embedding instrumentation into multi-hundred-to-thousand-metre-thick ice (sufficient to create 1 km³ volumes) is consistent with Antarctic conditions.
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