The refractive indices of some media are given below:
| Medium |
Refractive index |
| X |
1.51 |
| Y |
1.72 |
| Z |
1.83 |
| w |
2.42 |
In which of these is the speed of light minimum and maximum, respectively.
(a) X-minimum, W-maximum
(b) Z-minimum, W-maximum
(c) W-minimum, X-maximum
(d) X-minimum, Z-maximum
