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Physics
Physics
Problem
A ray originates in water
(
n
=
1.33
)
(n=1.33)
(
n
=
1.33
)
, strikes a plane glass slab
(
n
=
1.50
)
(n=1.50)
(
n
=
1.50
)
of parallel faces and finally emerges into air
(
n
=
1.00
)
(n=1.00)
(
n
=
1.00
)
. If the emergent ray makes an angle of
40
∘
40^{\circ}
4
0
∘
with the normal in air, determine the angle of incidence of the ray in water.
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