his question posed difficult for majority of the candidates. The poor performance level is a confirmation that the concept of polarization of light is either not well taught or not treated at all in schools. Many interpreted polarized glass as polarized light and hence listed the uses of polarization of light instead of polarized glasses.

The expected answer is

Uses of polarized glasses
- Welding
- Driving
- Sailing
- Skiing
- Viewing (solar) eclipse