A 10-MW Vertically Polarized Laser Beam Passes Through a Polarizing

A 10-mW vertically polarized laser beam passes through a polarizing filter whose axis is 30 degrees from the horizontal.What is the power in the laser beam that emerges from the polarizer?

A) 8.7 mW
B) 7.5 mW
C) 5 mW
D) 2.5 mW