`""_(i)u_(j)` represents refractive index when a light ray goes from medium I to medium j, then the product `""_(2)µ_(1)xx``""_(3)µ_(2)xx``""_(4)µ_(2)
`""_(i)u_(j)` represents refractive index when a light ray goes from medium I to medium j, then the product `""_(2)µ_(1)xx``""_(3)µ_(2)xx``""_(4)µ_(2)` is equal to
A. `""_(3)µ_(1)`
B. `""_(3)µ_(2)`
C. `(1)/(""_(1)µ_(4))`
D. `""_(4)µ_(2)`
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Correct Answer - C
(c ) `""_(2)µ_(1)xx``""_(3)µ_(2)xx``""_(4)µ_(3)`=`µ_(1)/µ_(2)xxµ_(2)/µ_(3)xxµ_(3)/µ_(4)=µ_(1)/µ_(4)=""_(4)µ_(1)=1/(""_(1)µ_(4)`
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