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  9. Q127

JPSC 2021 · Question 127 of 198

The speed of light in air depends on,

Physics

  1. ATemperature
  2. BPressure
  3. CDensity
  4. DIt is independent of pressure, temperature and densityCorrect

Answer: D. It is independent of pressure, temperature and density

Explanation

Per the official key (also confirmed by testbook's JPSC key notes), the intended answer is that the speed of light in air is treated as independent of pressure, temperature and density.

Source: JPSC Combined Civil Services (PT) 2021 (Advt 01/2021, held 19 Sep 2021), GS Paper-I (General Studies), Booklet Series-A; answers per official REVISED answer key (published 08 Oct 2021 on jpsc.gov.in, via JagranJosh), each cross-checked against factual records; Paper-I Q29.

← Q126View full paper (198 questions)Q128 →

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