Rank the colors of the spectrum from largest wavelength to smallest wavelength:

The colors of the spectrum from largest wavelength to smallest wavelength are Red, Orange, Yellow, green, Blue, Indigo Violet.

Explanation:

Red has the largest wavelength where violet is the smallest wavelength. The portion of the spectrum visible to human eye can be named as light. Spectral colors are those containing only one wavelength.

At first Newton divided the spectrum into six colors: red, orange, yellow, green, blue, and violet. Later he added indigo as the seventh color on his belief of seven was a perfect number as derived from the ancient Greek sophists. It is not easier to distinguish indigo and blue. only those who have good vision are able to distinguish them.