1.

From incident white light how will you obtain whit emergent light by making use of two prisms ?

Answer»

Solution :1. We can RECOMBINE the components of white light dispersed by one prism by placing a second IDENTICAL prism PARALLELTO the first prism in an upside down position.
2. When the colours of the spectrum from the first prism fall on the SECON prism,theyrecombine to produce white light.


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