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Kirchoff's Law

The plots for...

Question

The plots for intensity versus wavelength for three black bodies at temperatures $T_{1}, T_{2}, T_{3}$ respectively are shown in figure. Their temperatures are such that

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

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

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

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

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Solution

The correct option is A $T_{1} > T_{2} > T_{3}$
According to Wien's displacement law
$λ_{m a x} \propto \frac{1}{T}$
(or) $T \propto \frac{1}{λ_{m a x}}$
From figure, it is evident that $(λ_{m a x})_{1} < (λ_{m a x})_{2} < (λ_{m a x})_{3}$
$∴$ we can conclude that, $T_{1} > T_{2} > T_{3}$

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Kirchoff's Law

Standard XI Physics

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The plots for intensity versus wavelength for three black bodies at temperatures T1, T2, T3 respectively are shown in figure. Their temperatures are such that

The correct option is A T1>T2>T3According to Wien's displacement law λmax∝1T (or) T∝1λmax From figure, it is evident that (λmax)1<(λmax)2<(λmax)3 ∴ we can conclude that, T1>T2>T3

The plots for intensity versus wavelength for three black bodies at temperatures $T_{1}, T_{2}, T_{3}$ respectively are shown in figure. Their temperatures are such that

The correct option is A $T_{1} > T_{2} > T_{3}$
According to Wien's displacement law
$λ_{m a x} \propto \frac{1}{T}$
(or) $T \propto \frac{1}{λ_{m a x}}$
From figure, it is evident that $(λ_{m a x})_{1} < (λ_{m a x})_{2} < (λ_{m a x})_{3}$
$∴$ we can conclude that, $T_{1} > T_{2} > T_{3}$