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AP EAMCET2002PhysicsThermal Properties of Matter

When the temperature of a black body increases, it is observed that the wavelength corresponding to maximum energy changes from 0.26 m to 0.13 m . The ratio of the emissive powers of the body at the respective temperature is

Options

  1. A16 1
  2. B4 1
  3. C1 4
  4. D1 16

Correct answer

D. 1 16

Step-by-step solution

₁=0.26 m , ₂=0.13 m From Wein's displacement law. aligned T & = constant ₁ T₁ & = ₂ T₂ T₁ T₂ & = ₂ ₁ = 0.13 0.26 = 1 2 aligned Ratio of emissive powers E₁ E₂ = ( T₁ T₂ )^4= ( 1 2 )^4 =1: 16

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