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NEET2005PhysicsThermal Properties of MatterActual

Assertion : For higher temperatures the peak emission wavelength of a black body shifts to lower wavelengths. Reason : Peak emission wavelengths of a blackbody is proportional to the fourth-power of temperature.

Options

  1. AIf both assertion and reason are true and reason is the correct explanation of assertion
  2. BIf both assertion and reason are true but reason is not the correct explanation of assertion
  3. CIf assertion is true but reason is false
  4. DIf both assertion and reason are false.

Correct answer

B. If both assertion and reason are true but reason is not the correct explanation of assertion

Step-by-step solution

Wien's relation gives at maximum intensity, _m T= constant Stefan's law, T^4= Intensity of emission of a particular wavelength does not explains the shift of _m with absolute temperature.

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