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Physics
Physics
Problem
Which of the following correctly gives the refractive index of water with respect to air, if
n
air
=
n
1
n_{\text{air}}=n_1
n
air
=
n
1
and
n
water
=
n
2
n_{\text{water}}=n_2
n
water
=
n
2
? a)
n
1
n
2
\dfrac{n_1}{n_2}
n
2
n
1
b)
n
2
n
1
\dfrac{n_2}{n_1}
n
1
n
2
c)
n
2
n_2
n
2
d)
n
2
−
n
1
n_2-n_1
n
2
−
n
1
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