Question

investigation on refraction and total refraction

Answer 1

when a ray of light travels from denser to rarer medium then incident angle is always grater then critical angle then a ray of light reflect back into that medium the bending of light known as total internal reflection

Answer 2

refraction is the change in direction of a wave passing from one medium to another or from a gradual change in the medium.

refractive index or index of refraction of a material is a dimensionless number that describes how fast light travels through the material. It is defined as. where c is the speed of light in vacuum and v is the phase velocity of light in the medium.

Total internal reflection when refraction reflection at critical angle and refraction takes place called TIR