2026 Electromagnetic WavesElectromagnetic spectrum and modes of production Medium Question 1 of 49 in Electromagnetic Waves

Match List I with List II:

Column I

  • i. Microwave
  • ii. Visible light
  • iii. Gamma rays
  • iv. Infra-red rays

Column II

  • a. Electrons in atoms emit light when they move from a higher energy level to a lower energy level
  • b. Radioactive decay of nucleus
  • c. Vibration of atoms and molecules
  • d. Klystron valve or magnetron valve

Correct answer: i → d, ii → a, iii → b, iv → c

Solution

Microwaves: produced by klystron valve or magnetron valve Visible light: electrons in atoms emit light when they move from a higher energy level to a lower energy level Gamma rays: radioactive decay of nucleus Infra-red rays: vibration of atoms and molecules Correct match: i-d, ii-a, iii-b, iv-c.

Electromagnetic Waves in past papers

49 questions from this chapter have appeared across 24 exam years.