A blackbody radiates energy at the rate of E watt per metre 2 at a high temperature T K. When the temperature is reduced to T/3 K, the radiant energy will be

Asked In Exam: BPSC TRE 2.0

Options

  • A. E/16
  • B. E/27
  • C. E/81
  • D. More than one of the above
  • E. None of the above

Correct Answer (Detailed Explanation is Below)

C. E/81

Detailed Explanation

By Stefan-Boltzmann law, radiant energy per unit area is proportional to T^4. Therefore at T/3 it becomes E/81.

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BPSC TRE 4 General Science practice set 2

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