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Q.

In the figure given below a ray of light is incident from medium A to medium B, Refractive Index of medium B in relation to medium A is ___________________________________.

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a

1.42

b

1.11

c

1.05

d

1.22

answer is D.

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Detailed Solution

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The refractive index of medium B relative to medium A is 1.22.
Snell’s Law states that in a given pair of media, the ratio of the sines of the angle of incidence θ1 and angle of refraction θ2 is equivalent to the ratio of refractive indices (n) of two media.” Question Image

Mathematically,
n=sini sinr 
 n=sin 60° sin 45° 
 n=3×22×1
 n=1.22

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