Question

Total internal reflection cannot take place when light goes from

Answer 1

For total internal reflection tooccur the light must travel from a dense medium to a less dense medium (e.g. glass to air or water to air). As the angle of incidence increases so does the angle of refraction.

Answer 2

$\underline \bold{Total\:Internal\: Reflection}$

When the light ray refracts from denser to rare medium, and for a certain angle of incident then the ray travels along the interface of two media by making the angle of reflection equal to right angle.

The angle of incidence for which the reflected ray Travels along the interface of to media is called as Critical Angle.

The phenomena of bouncing back of light ray in the same medium when reflected from denser to rarer medium and falls in the interface that an angle greater to the critical angle for the given pair of media is called as total internal reflection.

The necessary condition of TIR are

• The light must refracts from denser to rare medium.

• The incidence must be above the critical angle for the pair of media.