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JAMB Physics 1997 Question 37

Question 37

Electromagnetic Spectrum

The electromagnetic waves that are sensitive to temperature changes are

  1. A.x-rays
  2. B.gamma-rays
  3. C.ultra-violet rays
  4. D.infra-red rays
Show the answer and explanation

Answer: D (infra-red rays)

Explanation

Infra-red rays are heat radiation: they are given out by warm bodies and are detected by their heating effect, e.g. with a thermopile or blackened thermometer.