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Question

A ray of light strikes a glass plate at an angle of 60°. If the reflected and refracted rays are perpendicular to each other, then the refractive index of glass is


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Solution

Step 1: Given data

The polarizing angle of incidence, ip=60°

The reflected and refracted rays are perpendicular to each other

Step 2: Formula used

From Brewster's law

Show that when the light is incident at polarising angle, the reflected and refracted  rays are mutually perpendicular to each other. - Sarthaks eConnect |  Largest Online Education Community

μ=tanip

Step 3: Solution

μ=tan60°μ=3

Hence, the refractive index is 3.


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