An Industrial CO₂ Laser Produces a Beam of Radiation with Average

An industrial CO₂ laser produces a beam of radiation with average power of 5.00 kW at a wavelength of 10.6 $\mu$ m.Such a laser can be used to cut steel up to 25 mm thick! The laser light is polarized in the x-direction,travels in the positive z-direction,and is collimated (neither diverging or converging) at a constant diameter of 120 $\mu$ m.Calculate the amplitude of the oscillating magnetic field produced by the laser light.

A) 3.2 * 10^-3 T
B) 1.7 * 10^-5 T
C) 1.5 * 10³ T
D) 1.8 * 10⁷ T
E) 0.061 T