1.

The relative permittivity and relative permeability of a medium are 3 and (4)/(3) respectively, the critical angle for this medium is

Answer»

`15^(@)`
`30^(@)`
`45^(@)`
`60^(@)`

Solution :If speed of light in medium is v, then `v=(1)/(SQRT(mu in))` and refractive INDEX
`n = (c )/(v)`
`(1)/(sqrt((mu_(r )in_(r )))=n`
`sqrt((4)/(3)xx3)=n`
2 = n
`2=(1)/(sin C)`
`THEREFORE sin C = (1)/(2)`
`therefore C = 30^(@)`


Discussion

No Comment Found

Related InterviewSolutions