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UPSC Combined Geo-Scientist

Chemist

  • 2 objective papers
  • 120 questions each
  • 2 h per paper
  • 100 + 300 marks

Prelims Paper I covers general studies.

UPSC Combined Geo-Scientist, Prelims · 2020 · Paper I, General Studies · Q107 of 120

Geo-Scientist Prelims 2020 General Studies Q107: Which of the following statements is NOT true regarding the…

QuestionPhysics / waves

Which of the following statements is NOT true regarding the infrared radiation?

  1. (a) It is electromagnetic in nature
  2. (b) Its wavelength is larger than that of the visible light
  3. (c) It can travel through vacuum
  4. (d) It is a longitudinal wave

Answer: (d) It is a longitudinal wave

Infrared is an electromagnetic wave: transverse, travels through vacuum, wavelength longer than visible (700 nm – 1 mm). So 'longitudinal' is false.

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