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

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

What is total internal reflection ?

What is total internal reflection?

A ray of light is incident on the left vertical face of glass cube of refractive index n_2, as shown in figure. The plane of incidence is the plane of the page, and the cube is surrounded by liquid (refractive index =n_1 ). What is the largest angle of incidence theta_1 for which total internal reflection occurs at the top surfaces?

A ray of light is incident on the left vertical face of glass cube of refractive index n_2, as shown in figure. The plane of incidence is the plane of the page, and the cube is surrounded by liquid (refractive index =n_1 ). What is the largest angle of incidence theta_1 for which total internal reflection occurs at the top surfaces?

Explain what is total internal reflection.