NEET2017Physics-Black Body Radiation
NEET 2017 Physics Black Body Radiation MCQ Question
Type: MCQ-numerical-Medium-Class 11
A spherical black body with a radius of 12 cm radiates 450 watt power at 500 K. If the radius were halved and the temperature doubled, the power radiated in watt would be:
A
225
B
450
C
1000
D
1800
Correct Answer
Option D
Detailed Explanation
The power radiated by a black body is proportional to the surface area and the fourth power of the temperature (Stefan-Boltzmann law).
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