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AP EAMCET2007PhysicsThermal Properties of Matter

A black body radiates energy at the rate of E watt / m ^2 at a high temperature T ~K . When the temperature is reduced to ( T 2 ) K , the radiant energy is

Options

  1. AE 2
  2. B2 E
  3. CE 4
  4. DE 16

Correct answer

D. E 16

Step-by-step solution

According to Stefan's law, array rlrl & E T^4 or & E₂ E₁ & = ( T₂ T₁ )^4 or & E₂ E & = ( T / 2 T )^4= ( 1 2 )^4 or & E₂ & = E 16 array

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