Determine the Amount of Energy Carried in 50 M of a 3.5-MW

Determine the amount of energy carried in 50 m of a 3.5-mW He-Ne laser beam if the cross-sectional area of the beam is 5.0 × 10−⁶ m².

A) 2.9 × 10^-8 J
B) 5.8 × 10^-10 J
C) 0.024 J
D) 2.9 × 10^-10 J