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Conditions for a light ray to pass undeviated - class-X
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Light starting from a medium of refractive
index $ \mu $ undergoes refraction into a medium of index $ \mu $. If I and r stand for angle of incidence are refraction respectively :
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A
$
\frac{\sin i}{\sin r}=\frac{\mu^{\prime}}{\mu}
$
\frac{\sin i}{\sin r}=\frac{\mu^{\prime}}{\mu}
$