When we place a glass prism in the path of a narrow beam of white light a spectrum is obtained. What happens when a second identical prism is placed in an inverted position with respect to the first prism? Draw a labelled ray diagram to illustrate it.
CBSE DELHI - SET 1 2012
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When the second identical prism is placed in an inverted position with respect to the first prism recombination of the spectrum from white light again.
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