NEET 2017 Physics Black Body Radiation MCQ Question
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:
225
450
1000
1800
Correct Answer
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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