Total internal reflection is bouncing back of light in same medium when it travels from denser to rarer medium when it travels at an angle greater than Critical angle
Critical angle is that angle of incidence for which angle of refraction will be 90°.
When light travels from denser to rarer medium at am angle greater than critical angle then it will not refract it will come back in same denser medium that is known as TIR( Total internal reflection)
2.Brilliance of Diamond 💎| Shining Of diamond
4.Totally reflecting Prism