Parallel rays of light of intensity are incident on a spherical black body kept in…

PHYSICS · Single correct · CBSE · Physics · Thermal Properties of Matter · Thermal Properties of Matter

Problem

Parallel rays of light of intensity I=912 Wm−2I = 912 \text{ Wm}^{-2} are incident on a spherical black body kept in surroundings of temperature 300 K300 \text{ K} . Take Stefan-Boltzmann constant σ=5.7×10−8 Wm−2 K−4\sigma = 5.7 \times 10^{-8} \text{ Wm}^{-2} \text{ K}^{-4} and assume that the energy exchange with the surroundings is only through radiation. The final steady state temperature of the black body is close to [Adv. 2014] (1) 330 K330 \text{ K} (2) 660 K660 \text{ K} (3) 990 K990 \text{ K} (4) 1550 K1550 \text{ K}

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