Question: An ideal polarizer is rotated at a rate Ï between a similar pair of stationary crossed polarizers. Show that the emergent flux density will be

An ideal polarizer is rotated at a rate Ï‰ between a similar pair of stationary crossed polarizers. Show that the emergent flux density will be modulated at four times the rotational frequency. In other words, show that

I = (1 cos 4wt) %3D

where I₁ is the flux density emerging from the first polarizer and I is the final flux density.

I = (1 cos 4wt) %3D

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