[填空题]
(a) Find the total power radiated into space by the Sun, r8x+ (,m.e8umiu;qf 4qrr myy assuming it to gd,o.aa w6jkju y/)txo6 8 x6mbe a perfect emitter at u,wxj. a)tadygojx8o m6 k/66$T\,=\,5500K$ The Sun’s radius is $7.0 \times10^{ 8}\,m$ $ \times10^{ 26}\,W$
(b) From this, determine the power per unit area arriving at the Earth, $1.5 \times10^{ 11}\,m$ away (Fig. 14–21). $ \times10^{ 3}\,W/m^2$
