find the refractive index of glass with respect to water. the refractive indices of these with respect to air are 3/2 and 4/3 respectively
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Refractive index of medium 1 with respect to medium 2,
1
μ
2
=
μ
1
μ
2
Refractive index of glass with respect to air,
g
μ
a
=
2
3
Refractive index of water with respect to air,
w
μ
a
=
3
4
g
μ
a
=
μ
g
μ
a
w
μ
a
=
μ
g
μ
a
∴refractive index of glass with respect to water,
g
μ
w
=
μ
a
μ
w
×
μ
g
μ
a
=
w
μ
a
g
μ
a
=
2
3
×
4
3
=
8
9
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