Question

Total internal reflection takes place when the light Ray travels from

Answer 1

Hello! dear,

Your answer goes like this ...

"Total Internal Reflection" occurs only when 

1.Light travels from optically denser medium to optically rarer medium.

2.The angle of incidence in the denser medium is greater than critical angle .


       So,The answer is Total Internal Reflection takes place when the light ray               travels from "Denser to Rarer medium."


Thank you dear,

Hope It helped.

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.