Question 1 Sunlight which reflects off smooth surfaces like those ofroads or sta

Question

Question 1

Sunlight which reflects off smooth surfaces like those ofroads or standing water becomes horizontally polarized in theprocess. Polarizing sunglass are designed to completely blockthis reflected glare ,while at the same time they reducethe intensity of unpolarized ambient light by one-half. (a) If asunglasses lens is to block reflected glare, what should theorientation of its transmission axis be? (b) LCD displays, such asflat panel computer display screens, and certainly automobileinstruments and digital wristwatch faces, should be readable bypeople wearing polarized sunglasses. In order for them to be  readable, what should thetransmission-axis orientation of their front “analyzer”filters be?

Explanation / Answer

(a) to block the horizontally polarized reflected light,the transmission axis of polarized sunglasses should be in theverticalorientation.

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(b) to allow the light from the LCD display to passthrough polarized lenses (of sunglasses) the analyzer filter shouldhave a transmission axis in vertical orientation (same as thesunglasses).

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