Question

The LIGO experiment, which historically detected gravitational waves for the first time in September 2015, uses a pair of highly sensitive Michelson interferometers. These have arms that are 4.00 km long and use powerful Nd:Yag lasers with 1064 nm wavelength. The beams traverse the arms both ways 280 times before recombining, which effectively lengthens the arm length to 1120 km. The devices are tuned so that the beams destructively interfere when they recombine if no gravitational wave is present.

The beam has power of 100 kW, concentrated into area of square centimeter. Calculate the amplitude of the electric field in the beam.

Answer 1

867755.73 V/m

Step-by-step explanation:

Detailed explanation and calculation is shown in the image below