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MHT CET Physics question

PhysicsThermal Properties of MatterMHT CET

The total radiant energy per unit area normal to the direction of incidence, received at a distance from the centre of a star of radius , whose outer surface radiates as a black body at a temperature kelvin is given by (where, is Stefan's constant)

Answer: (A)

Solution

Power emitted , spread over a sphere of area , so the intensity at is

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Question ID VK-063670