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Conditions Of Total Internal Reflection

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Essential conditions for total internal reflection:
(i) Light should travel from a denser medium to a rarer medium.
(ii) Angle of incidence in denser medium should be greater than the critical angle for the pair of media in contact.
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State the conditions of total internal reflection. Refractive indices of the given prism material for Red, Blue and Green colors are respectively 1.39, 1.48 and 1.42 respectively. Trace the path of rays through the prism.

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Rays of light fall on the plane surface of a half cylinder at an angle 45^@ in the plane perpendicular to the axis (see figure). Refractive index of glass is sqrt2. Discuss the condition that the rays do not suffer total internal reflection.

XII BOARD PREVIOUS YEAR PAPER ENGLISH-XII BOARDS-SET-I
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