A swimmer underneath the water (n = 1.33) looksup to the surface and watches the

Question

A swimmer underneath the water (n = 1.33) looksup to the surface and watches the sun set. The sun begins very highin the sky and eventually falls below the horizon of thelake.

(a) At some time before the sungets to the horizon, light from the sun that is reflected off thelake is completely polarized. At what angle does the sunappear to the swimmer at that moment? (The angle shown in thefigure may not be accurate.)

(b) Just as the sun gets to the horizon, at whatangle does the sun appear to the swimmer? (The angle shownin the figure may not be accurate.)

(b) Just as the sun gets to the horizon, at whatangle does the sun appear to the swimmer? (The angle shownin the figure may not be accurate.) A swimmer underneath the water (n = 1.33) looksup to the surface and watches the sun set. The sun begins very highin the sky and eventually falls below the horizon of thelake. (a) At some time before the sungets to the horizon, light from the sun that is reflected off thelake is completely polarized. At what angle does the sunappear to the swimmer at that moment? (The angle shown in thefigure may not be accurate.)

Explanation / Answer

A)according to brewster law for completely polarized light the polarizing anglep=tan-1n=tan-11.33=53.06degree. B) at this position p+angle of refraction r =90 so r=90-53.06=36.94degree hence the sun appear to the swimmer atan angle of 36.94degree.

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