The intensity of a cylindrical laser beam is 0.800 {rm W}/{rm m}^{2}. The cross-sectional area of the beam is 3.0 times 10^{ - 4} {rm m}^{2} and the intensity is uniform across the cross section of the beam.
A) What is the average power output of the laser?
B) What is the rms value of the electric field in the beam?