1.

The adjacent figure shows cross section of a hollow glass tube of internal radius r_(1), eexternal radius R and index of refraction n. For two rays DE andABC ( in which De lies on ODE and DE and BC are parallel), the separation r_(1) will be

Answer»

`r_(1) = (n - 1)R`
`r_(1) = n^(2)R`
`r_(1) = NR`
`r_(1) = n^(2)r`

SOLUTION : Uses Snell's law: `MU sin theta =` CONSTANT


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