Can we combine two prism? If yes what is the purpose?

Asked by Topperlearning User | 10th Jun, 2014, 02:28: PM

Expert Answer:

Yes we can combine two prisms of different materials.

We usually do it to:

A.     Dispersion without deviation:Two prisms of different materials and different suitable angles can be combined so as to produce only dispersion and no deviation in the path of the light of a particular colour.

B.      Deviation without dispersion:When white light passes through a prism, it suffers deviation as well as dispersion.However the two prisms of different material can be combined so as to produce deviation in the path of light without producing any dispersion.

Answered by  | 10th Jun, 2014, 04:28: PM