A

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Q. Which of the following devices can be used to detect radiant heat ?

  • (A) Liquid thermometer
  • (B) Six's maximum and minimum thermometer
  • (C) Constant volume air thermometer
  • (D) Thermopile
  • Correct Answer - Option(D)
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Explanation by: Admin
Based on the thermoelectric effect, the thermopile can be used as a heat sensor to measure thermal radiation. A thermopile is made of thermocouple junction pairs connected electrically in series. Thermocouples near the ground measures radiant energy.

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