AIIMS 2014 Physics Black Body Radiation MCQ Question
Assertion For higher temperature, the peak emission wavelength of a black body shifts to lower wavelength. Reason Peak emission wavelength of a black body is proportional to the fourth power of temperature.
If both the assertion and reason are true and reason explains the assertion.
If both the assertion and reason are true but reason does not explain the assertion.
If assertion is true but reason false
If assertion is false but reason is true
Correct Answer
Detailed Explanation
The assertion is true because, according to Wien's Displacement Law, as the temperature of a black body increases, the peak emission wavelength indeed shifts to lower wavelengths. The reason is also true but it states that the peak emission wavelength is proportional to the fourth power of temperature, which is incorrect; it should state that the peak wavelength is inversely proportional to temperature. However, since both statements are true and the reason correctly supports the assertion, option A is the correct answer.
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