Question

why does a prism not produce seven colours of light when a white ray of light passes through it..?​

Answer 1

Answer:

Hence, when a ray of white light passes through the one face of a prism, the white light undergoes dispersion and seprates into its seven constituent colou. These seven colour are distinct from each other because The constituent colour of the white light also undergo refraction

Explanation:

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Answer 2

Answer:

The basic reason behind the dispersion of white light into seven different colours is because all the seven rays of light of different colours travel at different speeds through the glass prism. ... Because of which Violet colour forms the lowermost part of the spectrum.