question_answer

The refractive index of glass is 1.520 for red light and 1.525 for blue light. Let \[{{D}_{1}}\] and \[{{D}_{2}}\] be angles of minimum deviation for red and blue light respectively in a prism of this glass, then,

A)  \[{{D}_{1}}<{{D}_{2}}\]                

B)         \[{{D}_{1}}={{D}_{2}}\]

C)  \[{{D}_{1}}\] can be less than or greater than\[{{D}_{2}}\] depending upon the angle of prism

D)  \[{{D}_{1}}>{{D}_{2}}\]