On reflection of light wave from rarer medium. What is the effect on its (a) path difference (b) phase.

When a light ray from a rarer medium is refracted into a denser medium, its

Assertion : In reflection from a denser medium, any ray of light suffers a phase difference of pi . Reason : Denser medium is that medium in which speed of wave is less.

Mention one difference between reflection of light from a plane mirror and total internal reflection of light from a prism.

The phase difference corresponding to path difference of x is

Statement -1: If an exceedingly thin soap film is seen in reflected light, it may appear dark Statement -2 : There is a phase difference of pi from the rays reflected from front and rear faces of the film.

What happens to the direction of ray of light if it travels from (a) a denser medium to a rarer medium (b) a rarer to a denser medium (c) perpendicular to the surface of separation of two mediums?

Statement-1 : On reflection from a rigid boudnary (denser medium ), there is a complete reversal of phase Statement-2 : This is because on reflection is a denser medium, both the particle velocity and wave velocity are reversed in sign.

In a wave, the path difference corresponding to a phase difference of phi is

Assertion: White light is incident on face AB of an isosceles right angled prism as shown. Colours, for which refractive index of material of prism is more than 1.414, will be able to emerge from the face AC. Reason:Total internal reflection cannot take place for the light travelling from a rarer medium to a denser medium.