Question

When the angle of the incidence is greater than critical angie, the light ray
gets reflected into the denser medium at the interface; i.e. light never enters
into the rarer medium?​

Answer 1

Answer:

this phenomenon is called total internal reflection

Answer 2

If the refractive index is lower on the other side of the boundary and the incident angle is greater than the critical angle, the wave cannot pass through and is entirely reflected. The critical angle is the angle of incidence ...