Red color has largest wavelenght and violet minimum (in the range of visible light). then why does violet light appears reddish? RED + BLUE = VIOLET

Question

My question is simple. Green light is more similar to red light than violet, then why is violet reddish and green not? in the language of frequencies and wavelengths, red and violet should contrast each other. Then why do they don't?

Answer 1

It just a matter of the definition of the word "violet". It often means light of short wavelength, as you suggest, and I think that would be the correct technical definition. But the word is sometimes used to mean red + blue, because the visual appearance is similar. If you viewed that color, you might not know which it is: short wavelength or red + blue. Sometimes "purple" is used to mean red + blue.