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Physics-

General

Easy

Question

The plots of intensity of radiation $v e r s u s blank$ wavelength of three black bodies at temperatures $T subscript 1 end subscript comma blank T subscript 2 end subscript a n d T subscript 3 end subscript$ are shown. Then,

$T_{3} > T_{2} > T_{1}$
$T_{1} > T_{2} > T_{3}$
$T_{2} > T_{3} > T_{1}$
$T_{1} > T_{3} > T_{2}$

The correct answer is: $T subscript 1 end subscript greater than T subscript 3 end subscript greater than T subscript 2 end subscript$

According to Wien’s law
$lambda subscript m end subscript proportional to fraction numerator 1 over denominator T end fraction$
And from the figure
$open parentheses lambda subscript m end subscript close parentheses subscript 1 end subscript less than open parentheses lambda subscript m end subscript close parentheses subscript 3 end subscript less than open parentheses lambda subscript m end subscript close parentheses subscript 2 end subscript$
Therefore, $T subscript 1 end subscript greater than T subscript 3 end subscript greater than T subscript 2 end subscript$

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