State the cause of dispersion, when white light enters a glass prism

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#1

State the cause of dispersion, when white light enters a glass prism. Explain with a diagram.


#2

Light is made-up of different colours. Each colour travels at its own speed inside a prism.Due to this different colours of light bend through different angles with respect to the incident ray, as they pass through a prism. The red light bends the least while the violet the most. Thus, the rays of each colour emerge along different paths and thus - become distinct. It is the band of distinct colours that we see in a spectrum.
The diagram is as shown:


#3

Please upload the Explain the diagram of dispersion of light.