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# What is the Brewster angle for air to glass transition? (Refractive index of glass = 1.5.)

Q10.8  What is the Brewster angle for air to glass transition? (Refractive index of glass = 1.5.)

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Given,

Refractive index of glass $\mu_{glass}=1.5$

Now as we know,

$tan\theta =\mu$

where $\theta$ is the polarizing angle, also called the Brewster angle.and $\mu$ is the refractive index.

so from here

$\theta =tan^{-1}(\mu _{glass})=tan^{-1}1.5=56.31^0$

Hence Brewster angle is $56.31^0$.

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