A black body is at a temperature of 5760 K. The energy of radiation emitted by the body at wavelength 250 nm is U 1 , at wavelength 500 nm is U 2 and that at 1000 nm is U 3 . Wien's constant, b = 2.88 × 10 6 nm K. Which of the following is correct?

Question

A black body is at a temperature of 5760 K. The energy of radiation emitted by the body at wavelength 250 nm is U 1 , at wavelength 500 nm is U 2 and that at 1000 nm is U 3 . Wien's constant, b = 2.88 × 10 6 nm K. Which of the following is correct?, U 1 = 0, U 3 = 0, U 1 > U 2, $\mathrm{U}_3 \mathrm{U}_1$

MARKS App · Accepted Answer

Given Temperature = 5760 K Wien's constant b = 2 . 88 × 10 6 nm K According to Wien's displacement law, maximum amount of emitted radiation corresponding to λ m = b T λ m = 2 . 88 × 10 6 nm K 5760 K = 500 nm From the graph, U 1 U 2 > U 3

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