1.

Light ray is travelling from a medium of refractive index mu in to air. Angle of incidence at the interface is 53^(@). Light ray is found to suffer total internal reflection. Select possible values of mu from the following :

Answer»

1.2
1.3
1.4
1.6

Solution :If light ray is reflected internally at an angle `53^(@)` then it MEANS critical angle for the pair of mediums must be less than `53^(@)`.
`sin^(-1)((1)/(mu))gt 53^(@)`
`rArr""(1)/(mu) gt sin 53^(@)`
`rArr""(1)/(mu gt (4)/(5)`
`rArr""mu gt 1.25`
Options (B), (c) and (d) satisfy above CONDITION and hence are correct options.


Discussion

No Comment Found

Related InterviewSolutions