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 90o. Then the relationship between i and μ is.
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Let the angle of reflection and refraction be r1,r2 respectively.
Since angle between reflected and refracted ray is 90∘,
From law of reflection, r1=i
From Snell's law,
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