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Physics
Physics
Problem
Light travels from medium A to medium B. Which statement is always true for the pair of relative refractive indices
n
A
B
n_{AB}
n
A
B
and
n
B
A
n_{BA}
n
B
A
? a)
n
A
B
+
n
B
A
=
1
n_{AB}+n_{BA}=1
n
A
B
+
n
B
A
=
1
b)
n
A
B
n
B
A
=
1
n_{AB}\,n_{BA}=1
n
A
B
n
B
A
=
1
c)
n
A
B
=
n
B
A
n_{AB}=n_{BA}
n
A
B
=
n
B
A
d)
n
A
B
+
n
B
A
=
2
n_{AB}+n_{BA}=2
n
A
B
+
n
B
A
=
2
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