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MHT CET202020 Oct 2020Evening ShiftPhysicsThermal Properties of MatterActual

A black body radiates maximum energy at wavelength ^ ^ and its emissive power is ^ E ^ . Now, due to change in temperature of that body, it radiates maximum energy at wavelength 2 3 . At that temperature, emissive power is

Options

  1. A27 E 16
  2. B81 E 16
  3. C91 E 16
  4. D54 E 16

Correct answer

B. 81 E 16

Step-by-step solution

_ T ₁= _ 2 T ₂ E = A T ₁⁴ T ₂= ₁ ~T ₁ ₂ E₂ E₁ = T₂⁴ T₁⁴ E ₂= E ₁ ₁⁴ ~T ₁⁴ ₂⁴ 1 ~T ₁⁴ = E ₁⁴ 16 81 ₁⁴ = 81 16 E

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