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Dispersion is the splitting of white light into its constituent colors when it passes
through a transparent medium. A spectrum is a band of colors that results from the
dispersion of white light.
Newton deduced from the preceding experiment that white light is a mixture of
seven different colors.
Tracing the Path of Light through a Prism
Let us now trace light's path through a prism. Trace the ABC boundary of a prism
on a white sheet of paper with the triangular face on the sheet.
Attach two T and S pins to one side.
Place the prism on the ABC boundary.
Fix two more pins Q and R through the other side so that all four pins appear to be
in the same line.
Remove the pins and make a note of where they are.
Connect TS and RQ and extend them to meet the prism faces at P and O,
respectively. Participate in PO.
Class X Science www.vedantu.com 43