Human Eye and Colourful World

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• Summary

When white light is passed through a glass prism, it splits into its seven constituent colours to form a band of seven colours. This phenomenon is called dispersion.

Spectrum: The band of seven colours formed due to the dispersion of white light is called spectrum.

Acronym: It is a group of alphabets that represent sequential colours in the spectrum. 'VIBGYOR'.

1. Red is the least deviated colour as it has largest/longest wavelength.
2. Violet is the most deviated colour as it has the smallest wavelength in the visible spectrum.