(a) At what angle of incidence will the light reflected from water (n=1.33) be c

Question

(a) At what angle of incidence will the light reflected from water (n=1.33) be completely polarized? (b) Does this angle depend on the wavelength of the light?
the tolerance is +/-2%





(a) At what angle of incidence will the light reflected from water (n=1.33) be completely polarized? (b) Does this angle depend on the wavelength of the light?
the tolerance is +/-2%





(a) At what angle of incidence will the light reflected from water (n=1.33) be completely polarized? (b) Does this angle depend on the wavelength of the light?
the tolerance is +/-2%

Explanation / Answer

Given,

Refractive index of water, n = 1.33

Reflected light will be completely polarized when the sum of incident angle and reflected angle equals 90°. This can be

shown to occur at incident angle i (called theBrewster angle)

Tan(i) = nt/ni

For this case:

Tan(i) = nt/ni = nwater/nair = (1.33)/(1.0) = 1.33

i= 53.06°

No, as we can see from the above formula, angle depends on refractive indexes.

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