(a) What is total internal reflection?
(b) State two conditions necessary for total internal reflection to occur.
(c) Draw diagrams to illustrate critical angle and total internal reflection.
(a) What is total internal reflection?
(b) State two conditions necessary for total internal reflection to occur.
(c) Draw diagrams to illustrate critical angle and total internal reflection.
(a) Total internal reflection: When a ray of light travelling in a denser medium, is incident at the surface of a rarer medium at the angle of incidence greater than the critical angle for the pair of media, the ray is totally reflected back into the denser medium. This phenomenon is known as total internal reflection.
(b) For total internal reflection, the two necessary conditions are
(i) The light must travel from a denser medium to a rarer medium.
(ii) The angle of incidence must be greater than the critical angle for the pair of media.
(c) Below diagram shows the total internal reflection when incidence angle is more than the critical angle
(a) Total internal reflection: When a ray of light travelling in a denser medium, is incident at the surface of a rarer medium at the angle of incidence greater than the critical angle for the pair of media, the ray is totally reflected back into the denser medium. This phenomenon is known as total internal reflection.
(b) For total internal reflection, the two necessary conditions are
(i) The light must travel from a denser medium to a rarer medium.
(ii) The angle of incidence must be greater than the critical angle for the pair of media.
(c) Below diagram shows the total internal reflection when incidence angle is more than the critical angle
