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Calculate the polarizing angle for the light traveling from the water of refractive index 1.33 to a glass of refractive index 1.53.

physical optics - polarization of light
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Calculate the polarizing angle for the light traveling from the water of refractive index 1.33 to a glass of refractive index 1.53.


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Solution:

Given,

Refractive index of the water (aμw) = 1.33,
The refractive index of the glass (aμg) = 1.53,

Now, the refractive index of glass with respect to water is 

\({}_w\mu_g={}_w\mu_a\times{}_a\mu_g=\frac{{}_a\mu_g}{{}_a\mu_w}\)

Now, using Brewster's law, the polarizing angle is

\(\tan\left(\theta_p\right)=\mu=\frac{1.53}{1.33}\)
Or, \(\theta_p=\tan^{-1}\left(\frac{1.53}{1.33}\right)=49^\circ\)

Hence, the required polarizing angle is 49°

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