an unpolarized light is incident on …
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Gaurav Seth 7 years ago
In unpolarized light the light vibrate in all possible planes but for polarised light the vibrations occur in a single plane.
The reflected wave will be totally polarised if reflected wave and refracted wave are perpendicular to each other.
If the incident angle is ip and refracted angle r then
ip+90∘+r=180∘⇒r=90∘−ip ip+90°+r=180°⇒r=90°-ip
Then according to Snell's law
μ=sinipsinr⇒μ=sinipsin(90∘−ip)⇒μ=sinipcosip⇒μ=tanip μ=sinipsinr⇒μ=sinipsin90°-ip⇒μ=sinipcosip⇒μ=tanip
where μμ is the refracted index of the transparent medium. This is called Brewster's law and ip is called the Brewster angle.
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