Two prisms A and B have dispersive powers of 0.012 and 0.018 respectively. The two prisms are incontact with each other. The prism A produces a mean deviation of ${1.2}^{\circ }$, what is the mean deviation produced by B if the combination is achromatic?

Q. Two prisms A and B have dispersive powers of 0.012 and 0.018 respectively. The two prisms are incontact with each other. The prism A produces a mean deviation of ${1.2}^{\circ }$, what is the mean deviation produced by B if the combination is achromatic?

Q. Two prisms $\text{A}$ and $\text{B}$ have dispersive powers of $0.012$ and $0.018$ respectively. The two prisms are in contact with each other. The prism $\text{A}$ produces a mean deviation of ${1.2}^{\circ }$, then the mean deviation produced by $\text{B}$ if the combination produces deviation without dispersion is

Q. In an achromatic combination of two prisms made of materials with dispersive powers $0.2$ and $0.25$, if the angular dispersion produced by each prism is $100$, the net deviation is:

Q. Two prisms A and B are in contact with each other.The dispersive powers of A and B are 0.04 and 0.03 respectively.The angular dispersion produced by A is $8^{\circ }$. The net angular dispersion produced by the combination, if the combination does not produce a net deviation is