Light from a Laser Forms a 1

Multiple Choice

Light from a laser forms a 1.31-mm diameter spot on a wall.If the light intensity in the spot is
What is the power output of the laser? Assume that all the light emitted by the laser hits the spot.

A) 21.3 mW
B) 13.2 mW
C) 17.9 mW
D) 24.7 mW