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Physics
Physics
Problem
Consider a light ray travelling in air is incident into a medium of refractive index
2
n
\sqrt{2n}
2
n
. The incident angle is twice that of refracting angle. Then, the angle of incidence will be : (a)
sin
−
1
(
n
)
\sin^{-1}(\sqrt{n})
sin
−
1
(
n
)
(b)
cos
−
1
(
n
2
)
\cos^{-1}\left(\sqrt{\frac{n}{2}}\right)
cos
−
1
(
2
n
)
(c)
sin
−
1
(
2
n
)
\sin^{-1}(\sqrt{2n})
sin
−
1
(
2
n
)
(d)
2
cos
−
1
(
n
2
)
2 \cos^{-1}\left(\sqrt{\frac{n}{2}}\right)
2
cos
−
1
(
2
n
)
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