CUET and UG exam KEAM Engineering Mock Test Series 2025 Physics Thermal Properties of Matter Heat transfer
Parallel rays of light of intensity \(I = 912 Wm^{-2}\) are incident on a spherical black body kept in surroundings of temperature \(300\) K. Take Stefan-Boltzmann constant \(\sigma = 5.7 \times 10^{-8} Wm^{-2} K^{-4}\) and assume that the energy exchange with the surrounding is only through radiation. The final steady state temperature of the black body is close to :
1
\(330 K\)
2
\(660 K\)
3
\(990 K\)
4
\(1550 K\)
5
\(1990 K\)