When a beam of light from a source, falls on a triangular prism, a band of colours is visible on the
opposite side. Explain your observation for the following occurring phenomenon.
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The seven colours of the spectrum are Red, Orange, Yellow, Green, Blue, Indigo, and Violet. ... The dispersion of white light occurs because colours of white light travel at different speeds through the glass prism. The amount of refraction (or bending) depends on the speed of coloured light in glass.
White light refracts when it passes through a prism. Each wavelength refracts at a different angle, and the emergent light forms a rainbow.
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