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Posted by on Monday, October 15, 2007 at 9:51pm.

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

  • Physics - , Monday, October 15, 2007 at 10:02pm

    energy wise, 1/2 the power is carried in each field. Use that to find E and B.

  • Physics - , Tuesday, October 16, 2007 at 12:51am


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