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Q.

The power emitted per unit area of a black body is R watt/m2. At what wavelength will the power radiated by the black body be maximum. If the Stefan’s constant is σ and Wien’s constant is b, then :

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a

λ=bσR1/4

b

λ=bR1/4

c

λ=bRσ1/4

d

λ=bσR1/4

answer is D.

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Detailed Solution

R = σ T4λ=bT=b(σ)1/4(R)1/4
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