physics

An industrial laser is used to burn a hole through a piece of metal. The average intensity of the light is S = 1.13 109 W/m2. What is the rms value of each of the following fields in the electromagnetic wave emitted by the laser?
(a) electric field
(b) magnetic field

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  1. You can solve for Emax by this

    S=(1/munaught*2*speedlight)Em^2

    Then solve for Bmax from Em/Bm= speedlight

    then the rms value of each is 1/sqrt2 * max value

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    bobpursley
  2. thanks!

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