how does the retina image black wavelength?

Answer 1

in pigments, black is the total sum of all colors,
in light it is the absence of any reflected "photons"
so when the retina detects no wavelengths
it tells the brain, well,
the lights are on but nobody's home.

Answer 2

"Black light," is a term people use for long wavelength UV light used at partices, dance clubs, etc. You can only see it because it has some blue still in it (not pure UV) and then because it hits stuff like clothes that absorb UV and emit other, visible, colors (fluorescence). But true black is the absensce of light. Silence is the absence of sound, bland is the absence of taste, I guess... numbness... well you get it.

Answer 3

"Black wavelength" doesn't exist. Its just the absence of light. So you retina doesn't image it at all.

Answer 4

Black is the brain's interpretation of the *absence* of all visible wavelengths of light.

Answer 5

Black is the absence of light in the entire visible spectrum.

Answer 6

It doesn't. But our brain detects the absence of the signal from retina and decodes it as "dark".

Answer 7

There is no such thing as the black wavelength.

Answer 8

Black is the ABSENCE of light(in the visible spectrum). If you are referring to "black light", that is ultraviolet light(Latin "ultra" meaning "beyond" + "violet"), and can damage your eyes.

Answer 9

When you observe an object, that object is absorbing all frequencies of light EXCEPT the color you see- which its reflecting back into your face. So you see a "red" ball- all frequencies of light except "that color red" is absorbed- the red is reflected back to your face.

A black object is an object that reflects all light frequencies- white, has absorbed it

Answer 10

When you see black, it's because you are percieving nothing at all.