Which of the following graphs correctly represents the variation of logλm with logT? [λm is the wavelength corresponding to maximum intensity of radiation and T represents absolute temperature.]
A
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B
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C
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D
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Solution
The correct option is B According to Wien's displacement law, λmT=b Taking logarithm on both sides, we get logλm+logT=logb ⇒logλm=−logT+logb Comparing this with Y=mX+c we can conclude that the graph of logλm vs logT is as shown below.