""(i)u(j) represents refractive index wh...

`""_(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

`""_(e)mu_(1)`

`""_(3)mu_(2)`

`(1)/(""_(1)mu_(4))`

`""_(4)mu_(2)`

Text Solution

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The correct Answer is:

`""_(2)mu_(1) xx ""_(3)mu_(2) xx""_(4)mu_(3) = (mu_(1))/(mu_(2)) xx (mu_(2))/(mu_(3)) xx (mu_(3))/(mu_(4)) = ""_(4)mu_(1) = (1)/(""_(1)mu_(4))` .

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