Derive the Mueller matrix for a quarter-wave plate with its fast axis at -45°. Check that this matrix effectively cancels the one in Problem 8.81, so that a beam passing through the two wave plates successively remains unaltered.

Data from Prob. 8.81

Confirm that the matrix

will serve as a Mueller matrix for a quarter-wave plate with its fast axis at +45°. Shine linear light polarized at 45° through it. What happens? What emerges when a horizontal P-state enters the device?

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