MHT CET 2026 Physics question
A black disc has a radius 'R' and wavelength corresponding to the maximum intensity is ''. The emissive power (E) for the different radii and maximum wavelengths is directly proportional to
Answer: (B)
Solution
By Stefan-Boltzmann law the power radiated by a black body is . For the disc the radiating area is (proportional to the square of the radius). By Wien's displacement law , so \propto$
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