can the human eye see the color indigo?

Question

im asking cuz me and my sis are having a big fight about who is right and i say humans cant see indigo but she says they can. who is right!!!????

Answer 1

yes
Indigo (or spectral indigo) is the color on the spectrum between 440 and 420 nanometres in wavelength, placing it between blue and violet. Indigo and violet are different from purple (as defined by chromaticians [color scientists]) which does not exist on the electromagnetic spectrum and which can be achieved using additive primary colors by mixing blue light with a red light.

One can see spectral indigo by looking at the reflection of a fluorescent tube in a non-recordable compact disc. This works because the CD functions as a diffraction grating, and a fluorescent lamp generally has a peak at 435.833 nm (from mercury), as is visible on the fluorescent lamp spectrum.

Techinically speaking, you should be able to see it, but:
The human eye is relatively insensitive to indigo's frequencies, and some otherwise well-sighted people cannot distinguish indigo from blue and violet. For this reason some commentators including Isaac Asimov have suggested that indigo should not be regarded as a color in its own right but merely as a shade of blue or violet.

So, your sister might be able to see it while others might not be able. Both of you are right, but the color Indigo does exist but might not be as visible to others.

Answer 2

I saw plenty of indigo. I used to work in the Dye House at the white oak plant of Cone Fabrics, in Greensboro, NC. Seeing it is not the problem, Removing it is.

Answer 3

If it's a color, humans can see it. Colors are part of visible light spectrum. It's like the old question, "If a tree falls and no one is there to hear it, did it make a sound." Same thing, just visual.

Answer 4

Indigo is a shade of purple

Answer 5

yes, human eye can see Indigo, i think
it is a cross between purple and maroon(:

Answer 6

yes, its a color in the rainbow.next time she says that tell her to look at a rainbow.

Answer 7

IF THEY COULDN'T SEE IT HOW WOULD THEY KNOW WHAT COLOUR IT WAS...THINK ON MAN