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The dispersion of white light occurs because the colours of white light travel at different [[1]] through the glass prism.

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Detailed Solution

The dispersion of white light occurs because colours of white light travel at different speeds through the glass prism.
“When a beam of light is incident on the prism, it splits into seven colours after passing through the prism”. The wavelengths of each light colour are different, which is why each light colour travels at different speeds. When white light passes through a prism, it splits into its seven unique colours, which is known as dispersion. Different colours of light bend at different angles about the incident ray when they travel through a prism, which causes white light dispersion.

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