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(a) Ordinary light incident on one Polar...

(a) Ordinary light incident on one Polaroid sheet falls on a second Polaroid whose plane of vibration makes an angle of `30^(@)` with that of the first Polaroid. If the Polaroids are assumed to be ideal, what is the fraction of the original light transmitted through both Polaroids?
(b) If the second Polaroid is rotted until the transmitted intensity is 10 percent of the incident intensity, what is the new angle?
`[(a)3//8, (b) 63.4^(@)]`

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