Total internal reflection occurs in waves, when wave enters-

What will be the minimum angle of incidence such that the total internal reflection occurs on both the surfaces?

Fill in the blanks: Q: Total internal reflection occurs only when a ray of light passes from a _____medium to a ____medium.

Can total internal reflection occur when light goes from a rarer to a denser medium.

Can total internal reflection occur when light goes from a rarer to a denser medium.

A sound wave travelling with a velocity V in a medium A reaches a point on the interface of medium A and medium B . If the velocity in the medium B be 2 V , then the angle of incidence for total internal reflection of the wave will be greater than: