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AP EAMCET202315 May 2023Evening ShiftPhysicsThermal Properties of MatterActual

The emissivity of a perfect black body is increased to 16 times by increasing its temperature. If the initial temperature is T , then final temperature of that black body is

Options

  1. A4 ~T
  2. B8 ~T
  3. C2 ~T
  4. D16 ~T

Correct answer

C. 2 ~T

Step-by-step solution

According to Stefan's law, aligned & E = T ^4 & E 16 E = T ^4 T ₂^4 & T ₂ ^4=16 ~T ^4 ; T ₂=2 ~T aligned

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