Physics · PYQ NEET UG 2019(1)

In total internal reflection when the angle of incidence is equal to the critical angle for the pair of media in contact, what will be angle of refraction?

1. A
   equal to angle of incidence
2. B
   \( 90^\circ \)
3. C
   \( 180^\circ \)
4. D
   \( 0^\circ \)