An industrial laser is used to burn a hole through a piece of metal. The average density of the light is S = 1.22 109 W/m2. What is the rms value of each of the following fields in the electromagnetic wave emitted by the laser?
(a) the electric field
(b) the magnetic field
energy wise, 1/2 the power is carried in each field. Use that to find E and B.posted by bobpursley
Thanks!posted by Mary