A light ray of yellow colour is incident on an equilateral glass prism at an angle of incidence equal to 48^(@) and suffers minimum deviation by an angle of 36^(@). (i) What will be the angle of emergence ? (ii) If the angle of incidence is changed to (a) 30^(@) (b) 60^(@), state in each case whether the angle of deviatioin will be equal to, less than or more than 36^(@). ?

A light ray of yellow colour is incident on an equilateral glass prism

1.	A light ray of yellow colour is incident on an equilateral glass prism at an angle of incidence equal to 48^(@) and suffers minimum deviation by an angle of 36^(@). (i) What will be the angle of emergence ? (ii) If the angle of incidence is changed to (a) 30^(@) (b) 60^(@), state in each case whether the angle of deviatioin will be equal to, less than or more than 36^(@). ?
Answer» ANSWER :(i) `48^(@)` (II) (a) more than `36^(@)` (B) more than `36^(@)`.