A black body is at a temperature of 5760 K. The energy of radiation emitted by the body at wavelength 250 nm isU1 , at wavelength 500 nm is U2 and that at 1000 nm is U3. Wien’s constant, b=2.88×106nmK. Which of the following is correct?

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U1>U2

U2>U1

U1=0

U3=0

answer is B.

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Detailed Solution

According to Wein's displacement law λm=bT=2.88×106nmK5760 K=500nmClearly from graph U1U3

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