Brewster's Law

Author:Umakant Kondapure, Collin Fernandes, Nipun Bhatia, Vikram Bathula & Ketki Deshpande
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Important Questions on Brewster's Law

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Ordinary light incident on a glass slab at the polarising angle suffers a deviation of $34^{\circ} .$ The value of the angle of refraction in glass in this case is

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Assertion: If the light is polarised by reflection, then the angle between reflected and refracted ray is 180°
Reason: Brewster's law: μ=tanip.

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$\lambda_{\mathrm{a}}$ and $\lambda_{\mathrm{m}}$ are the wavelengths of a beam of light in air and medium respectively. If ip is the polarising angle, the correct relation between $\lambda_{\mathrm{a}}, \lambda_{\mathrm{m}}$ and $\mathrm{i}_{\mathrm{p}}$ is

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A ray of light travelling in impure water is incident on a glass plate immersed in it. When the angle of incidence is $51^{\circ},$ the reflected ray is totally plane polarised. Given that refractive index of impure water is $1.4 .$ The refractive index of glaiss should be $\quad\left(\tan 51^{\circ}=1.235\right)$

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The angle of polarisation for any medium is $60^{\circ} .$ What will be the critical angle for this?

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The relation between the polarising angle and the critical angle is 

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The angle of incidence at which reflected light is totally polarise for reflection from air to glass (refraction index μ) is

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Light is incident at an angle $i$ on a glass slab. The reflected ray is completely polarised. The angle of refraction is 

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The polarising angle for transparent medium is θ; v is the speed of light in that medium. Then the relation between θ and vis (c is velocity of light in air) 

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A ray of light is incident at an angle i on a glass slab of refractive index μ. The angle between reflected and refracted light is 90°. Then the relationship between i and μ is

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The Brewster angle for the glass-air interface is $54.74^{\circ} .$ If a ray of light going from air to glass strikes at an angle of incidence $45^{\circ}$, then the angle of refraction is (Hint: $\left.\tan 54.74^{\circ}=\sqrt{2}\right)$

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The polarizing angle of glass is $57^{\circ} .$ A ray of light which is incident at this angle will have an angle of refraction as 

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The deviation produced when light wave is incident on a denser medium with an angle of incidence equal to polarising angle is $24^{\circ} .$ The angle of incidence is 

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Unpolarised light is incident from air on a plane surface of a material of refractive index μ. At a particular angle of incidence i, it is found that the reflected and refracted rays are perpendicular to each other. Which of the following options is correct for this situation?

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From Brewster's law, except for polished metallic surfaces, the polarising angle 

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Figure represents a glass plate placed vertically on a horizontal table with a beam of unpolarised light falling on its surface at the polarising angle of 57° with the normal. The electric vector in the reflected light on screen S will vibrate with respect to the plane of incidence in a

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When unpolarised light is incident on a plane glass at Brewster's angle, then which of the following statements is correct?

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A ray of light is incident on the surface of a glass plate of refractive index 1.55 at polarizing angle. The angle of refraction is,

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When the angle of incidence on a material is 60°, the reflected light is completely polarized. The velocity of the refracted ray inside the material is m s-1,