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MHT CET 2025 Physics question

PhysicsThermal Properties of MatterMHT CET 2025

Two black spheres P & Q have radii in the ratio 4 : 3. The wavelength of maximum intensity of radiation are in the ratio 4 : 5 respectively. The ratio of radiated power by P to Q is

Answer: (A)

Solution

By Wien's law , so : . By Stefan's law the radiated power of a black sphere is . Hence

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Question ID VK-103095