Define total internal reflection how this phenomenon
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When the light travels from the denser to the rarer medium and angle of incidence is more than the critical angle for the pair of medium. Then the light suffers reflection instead of refraction. This phenomenon is known as total internal reflection of light.
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Total internal reflection is the phenomenon which occurs when a propagated wave strikes a medium boundary at an angle larger than a particular critical angle with respect to the normal to the surface. ... The critical angle is the angle of incidence above which the total internal reflection occurs.
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