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COMEDK2012PhysicsThermal Properties of Matter

A black body at a temperature T radiates energy at the rate of E Wm ⁻² . If the temperature is decreased by T / 2 , then the energy radiated will be

Options

  1. AE / 4
  2. BE / 16
  3. CE / 8
  4. DE / 32

Correct answer

B. E / 16

Step-by-step solution

According to Stefan's law, Energy radiated E T⁴ array ll & E^ E = T^ T = ( T 2 )⁴ T⁴ = 1 2⁴ = 1 16 or & E^ = E 16 array

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