Question

By properly combining two prism made of different materials, it is possible to

• A. have dispersion without average deviation
• B. have deviation without dispersion
• C. have both dispersion and average deviation.
• D. have neither dispersion nor average deviation.

Answer 1

Answer: (A), (B), (C)

The correct options are
A have deviation without dispersion
B have dispersion without average deviation
C have both dispersion and average deviation.

We can either have deviation or not and same for dispersion as only $\mu$ is different and angle of prism is of our choice
option $A,B,C$ are correct