Emissivity and Radiative Heat Flow Quiz
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Questions and Answers

Which of the following statements about emissivity is true?

  • Objects with low emissivity emit more radiation.
  • Emissivity is a measure of how much radiation an object absorbs.
  • Emissivity is a characteristic of the radiating material's surface. (correct)
  • Emissivity is a measure of an object's temperature.

    • What happens to the radiant heat flow from an object with high emissivity?

  • It remains the same.
  • It increases. (correct)
  • It decreases.
  • It becomes zero.

    • What factors determine the net rate of radiant heat flow from an object?

  • The object's emissivity and temperature difference between the object and its surroundings. (correct)
  • The object's temperature only.
  • The temperature difference between the object and its surroundings.
  • The object's emissivity only.

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