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MHT CET202312 May 2023Evening ShiftPhysicsThermal Properties of MatterActual

A black body radiates maximum energy at wavelength ' ' and its emissive power is ' E '. Now due to a change in temperature of that body, it radiates maximum energy at wavelength 3 . At that temperature emissive power is

Options

  1. A16: 1
  2. B256: 1
  3. C81: 1
  4. D128: 1

Correct answer

C. 81: 1

Step-by-step solution

Emissive power of black body is, From Wien's Law: aligned E & = T ^4 & = b T E & = b ^4 ^4 E ₂ E ₁ & = ₁^4 ₂^4 = ^4 ( 3 )^4 = 81 1 aligned

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