The prism A and B are in contact with each other have angular dispersion of 2^@ and 4^@ respectively. The dispersive power of A is 0.002. If the combination produces dispersion without deviation the dispersive power of B is

The prism A and B are in contact with each other have angular dispersi

1.	The prism A and B are in contact with each other have angular dispersion of 2^@ and 4^@ respectively. The dispersive power of A is 0.002. If the combination produces dispersion without deviation the dispersive power of B is
Answer» 0.001 0.004 0.002 0.006 Answer :B