Question

A beam of polarized light with an average intensity of 17.1 W/m2 is sent through a polarizer. The transmission axis makes an angle of 27° with respect to the direction of polarization. Determine the rms value of the electric field of the transmitted beam.

Answer in N/C
bobpursley
half that power is in the E field.

1/2 * 17.1= epsilion*E^2/2

solve for E.

Now after the polarizer, only cos27 gets thru.

Efinal=E cos27

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