NEETPhysics-Thermodynamics
NEET Physics Black Body Radiation MCQ Question
Type: MCQ-numerical-Hard-Class 11
The power radiated by a black body is P and it radiates maximum energy at wavelength . If the temperature of the black body is now changed so that it radiates maximum energy at wavelength , the power radiated by it becomes nP. The value of n is:
A
3/4
B
4/3
C
81/256
D
256/81
Correct Answer
Option C
Detailed Explanation
According to Wien's displacement law, . If the wavelength triples, the temperature becomes one-third. The power radiated is proportional to , so .
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