Where is Total internal reflection occurs when a beam of light Answer?

Answer 1

Total internal reflection occurs under two conditions;

1)the light must be traveling from more dense to less dense mediums

2)the light ray must hit the surface at an angle ,called the critical angle, or larger, as measured from a perpendicular (surface normal) line to the surfaces. The critical angle is typically in the 40 - 50 deg range, but specifically depends on the densities of the two media.

Answer 2

Total Internal Reflection mostly occurs in prisms, glass blocks and fibre-optics (long, thin strands of glass). In fibre-optic cables, the beam of light enters the strand and when the beam of light hits the wall of glass the light is reflected back inside the strand, so the light does not leave the cable and is bounced all along the strand until it reaches the other end of the cable. Total internal reflection is the angle where the light hits the surface of a material (e.g. glass) and is reflected back into the material. The T.I.R is usually 41.8 degrees. If the beam of light hits the surface with an angle larger than 41.8 degrees, the light leaves the material.