Question

A ray of light travelling in a transparent medium f refractive index `mu`, falls on a surface separating the medium from air at an angle of incidence of `45^(@)`. For which of the following value of `mu` the ray can undergo total internal reflection ?
A. `mu=1.33`
B. `mu=1.41`
C. `mu=1.50`
D. `mu=1.25`

Answer 1

Correct Answer - B
(b) For total internal reflection,
i`gt`C
`rArr sinigtsinCrArrsin45^(@)gt1/mu`
`rArrmugtsqrt2rArrmugt1.414`