The human visual organ has the function of sensing the light and color of external objects. The wavelength range of visible light is generally 380nm (nanometer) to 780nm, which is called the visible spectrum. In the visible spectrum range, radiation of different wavelengths makes people feel different colors Generally speaking, 700nm is red, 580nm is yellow, 510nm is green, 470nm is blue, and 400nm is purple.
indicative of the above phenomenon?
The feelings that people form about things are the result of their own physiological activities