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How will you use two identical prisms so that a narrow beam of white light incident on one prism emerges out of the second prism as white light? Draw the diagram.
Answers (1)
Ans.
In normal orientation of a prism, we have:
If we place another prism in front of this prism, we get:
Angle of deflections of both the prisms is equal and opposite. The first prism splits the white light in seven constituent colours, and the second prism combines these colours back to a single ray to give white light as the emergent light.
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