Answer:
Colors such as white, black, and gray are not visible in the light spectrum.
Explanation:
For a human eye to perceive colors, there are certain colors from the electromagnetic spectrum that are visible and some that aren't. These colors are visible based on their certain wavelengths in the electromagnetic radiation level.
Depending on the wavelength of the light seen, colors are visible to the naked human eye. While colors like red, orange, yellow, green, blue, violet, and indigo are easily visible while neutral colors such as black, white, and gray are not.
