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Flow Chart for State Inter-Conversion

7.Meaning of ...

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7.Meaning of rare medium and denser medium…

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What do you mean by optically denser and optically rarer mediums?

Q. What happens when light enters from
(a) denser medium to rarer medium
(b) rarer medium to denser medium

Q. Let the refractive index of a denser medium with respect to a rare medium be

N_{12}

and its critical angle

θ_{C}

. At an angle of incidence A when light is travelling from denser medium to rarer medium, a part of the light is reflected and the rest is refracted and the angle between reflected and refracted rays is

90^{o}

. Angle A is given by :

Total internal reflection of a ray of light is possible when the ( $i_{c}$ = critical angle, $i$ = angle of incidence)

Q. A wave or a pulse is reflected normally from the surface of a denser medium back into the rare medium .The phase change caused by the reflection-

1)0
2)pi/2
3)pi
4)3pi/2

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Flow Chart for State Inter-Conversion

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