MHT CET 2022 Physics question
Three black discs x, y, z have radii 1 m, 2 m and 3 m respectively. The wavelength corresponding to maximum intensity are 200 nm, 300 nm and 400 nm respectively. The relation between emissive power , and is
Answer: (A)
Solution
By Wien's law , so . By Stefan's law the radiated power of a black disc is . In units of 100 nm: , $
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