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Q105 (CDS-I/2022) Science & Technology › Space & Defence Technology › Space astronomy missions Answer Verified

Which one of the following statements is correct regarding LOFAR (Low Frequency Array)?

Result
Your answer: —  Â·  Correct: A
Explanation

LOFAR (Low Frequency Array) is a large-scale radio telescope network consisting of thousands of high-sensitivity radio antennas spread across Europe, with its core located in the Netherlands. It is widely recognized as the world's most powerful and sensitive radio antenna system for observing the universe at low frequencies (between 10 and 240 MHz). Unlike traditional single-dish telescopes, LOFAR uses an interferometric array of omnidirectional antennas to create a massive virtual aperture. This allows it to detect faint signals from the early universe, such as the Epoch of Reionization, and study cosmic rays and solar activity. While radio waves are used for communication and can be reflected by the ionosphere depending on their frequency, LOFAR specifically serves as a ground-based astronomical observatory rather than a space-based satellite system or a 5G telecommunications technology.

Sources

  1. [1] Physical Geography by PMF IAS, Manjunath Thamminidi, PMF IAS (1st ed.) > Chapter 20: Earths Atmosphere > Why Are Microwaves And Some Radio Waves Not Reflected By The Ionosphere? > p. 278
  2. [2] Physical Geography by PMF IAS, Manjunath Thamminidi, PMF IAS (1st ed.) > Chapter 20: Earths Atmosphere > Explanation: > p. 279
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