MHT CET 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 [MHT-CET 2020]
Answer: (A)
Solution
Emissive power (power per unit area) is and , so the disc with the smallest wavelength (x, 200 nm) is
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