A Pressure Of $15 \times 10 ^ { - 6 } \mathrm {~N} / \mathrm { m } ^ { 2 }$

Multiple Choice

A pressure of $15 \times 10 ^ { - 6 } \mathrm {~N} / \mathrm { m } ^ { 2 }$ is due to sunlight being reflected from a surface of a "solar sail." The energy flux incident on the surface is

A) 1125 W/m².
B) 2250 W/m².
C) 4500 W/m².
D) 9000 W/m².