A linear polarized electromagnetic wavelength is sent through 2 sheets of polari

Question

A linear polarized electromagnetic wavelength is sent through 2 sheets of polarized material, sheet A is oriented so its transmission axis makes an angle of 30 degrees with respect to the incident electric field wavelength. Sheet B is oriented so that the transmission axis makes an angle of 90 degrees with the incident electric field wavelength. The incident beam has an electric field of peak magnetitude E0 and average intensity. What is the peak value of the electric field amplitude after it goes through sheet A?
.30E0, .50E0, .60E0, .75Eo, .87E0? Please explain

Explanation / Answer

0.87E0

Electric field = E0cos

=30 gives 0.87E0

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