The refractive index of glass for red light is $1.520$ and for blue light is $1.525$. Suppose the deviations of red and blue light in a prism of this glass are $D_1$ and $D_2$ respectively. Then .....
- A$D_1 < D_2$
- B$D_1 = D_2$
- C$D_1$ and $D_2$ depend on the angle of the prism.
- D$D_1 > D_2$
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