The phenomenon which occurs when an incident wave strikes an interface at an angle greater than the critical angle with respect to the normal to the surface is called as ____________

Optoelectronics and Optical Communication 

The phenomenon which occurs when an incident wave strikes an interface at an angle greater than the critical angle with respect to the normal to the surface is called as ____________

a) Refraction 
b) Partial internal reflection 
c) Total internal reflection 
d) Limiting case of refraction

Answer : - Total internal reflection