A light ray of yellow colour is incident on an equilateral glass prism at an angel of incidence equal to
A light ray of yellow colour is incident on an equilateral glass prism at an angel 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 changes to (a) 30°, (b) 60°, state whether the angle of deviation will be equal to, less than or more than 36° ?
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(i) As the ray is suffering minimum deviation in an equilateral glass prism so
i1 = i2
∴ i2 = 48o
(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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