The Intensity of Solar Radiation on Earth Is About 1 $\times$

Multiple Choice

The intensity of solar radiation on Earth is about 1.4 $\times$ 10³ W/m².How many 50-W light bulbs would you have to arrange in an array 3 m from you in order to obtain the same intensity as the Sun?

A) 8.0 $\times$ 10²
B) 5.3 $\times$ 10²
C) 3.2 $\times$ 10³
D) 1.0 $\times$ 10⁷
E) 1.6 $\times$ 10³