The Surface of the Sun Has a Temperature of About

Multiple Choice

The surface of the Sun has a temperature of about 5 770 K.If the radius of the Sun is 7 × 10⁸ m,determine the power output of the Sun.(Take e = 1,and σ = 5.67 × 10−⁸ W/m²⋅K⁴) .

A) 3.9E+26 W
B) 1.2E+26 W
C) 6.7E+22 W
D) 2.2E+30 W
E) 5.5E+17 W