In which manner do the two identical prism can be used so that a narrow beams of light incidents on one prism emerges out of the second prism as white light ? Represent tge given situtation with the help of ray diagram ? (2) marks
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By placing an identical prism in an inverted position with respect to another prism.
The first prism here disperses the white light into seven colours and the second prism recombines to form white light....This is what is mentioned as recombination of the spectrum of white light.
The figure is from the science ncert textbook class 10th
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