. A light ray of yellow colour is incident on an equilateral glass prism at an angle of incidence equal to 48o and suffers minimum deviation by an angle


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

 

Best Answer

(i) As the ray is suffering minimum deviation in an equilateral glass prism so

glass prism

(ii) If the angle of incidence is changed to

(a) 30o, the angle of deviation will be more than 36o.

(b) 60o, the angle of deviation will be more than 36o.

 

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