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Draw a ray diagram to show a right angle...

Draw a ray diagram to show a right angled isosceles prism may be used to ''bend the path of light rays by `90^(@)`.
Write the necessary condition in terms of the refractive index of the material of this prism for the ray to bend to `90^(@)`.

Text Solution

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Angle of incidence should be greater then critical angle for the material of prism.
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