there apparently is 9 colours in the rainbow but we disreguard 2 because we cant see them what 2 colours are they!!!!
2007-03-01 11:18:23 · 16 answers · asked by stacyroach 2 in Science & Mathematics ➔ Earth Sciences & Geology
Infra red and Ultra Violet - they lie outside the range of human vision. There may be more colours, but we can not see them, so we have grouped all the reds below our range as Infra red, and all the violets above our range as Ultra Violet.
The human eye is most sensitive to yellow, and when we get old, we loose the red and Violet colours as well, that's why grannies dye their hair that silly blue rinse, it looks blond to them, and they prefer brown colours in the house decoration, as red blues get darker to them.
We can see Ultra violet in very low light conditions, it makes our underwear sparrkle in night clubs - and infra red was discovered when electronics was tinkered with. If you use night vision, it is using the long waves of IR to illuminate an object.
2007-03-01 11:21:31 · answer #1 · answered by DAVID C 6 · 2⤊ 0⤋
Hello,
(ANS) The ElectroMagnetic spectrum consists of energies vibrating at different frequencies. Human beings can only perceive (see) a very narrow range of those virbrations. These tend to be in the middle bands or middle frequencies i.e. white light and a few other colours.
To answer your question then its the wavelengths at the extreme ends of the EMS that are beyond the skill of human senses. These are very short wavelengths & very long wavelengths, so this means Ultra Violet wavelengths UVA & UVB and at the other end Infra Red radiation.
**And obviously short wave radio, long wave radio (AM & FM), Micro-wave radiation, X rays, Gamma rays, & various other particles and frequencies are beyond human senses too.
IR
2007-03-01 19:33:57 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Infra Red and Ultra Violet
2007-03-01 19:21:29 · answer #3 · answered by BARROWMAN 6 · 1⤊ 0⤋
Infra red and Ultra violet
2007-03-01 19:21:31 · answer #4 · answered by burninhotboi 2 · 1⤊ 0⤋
The normal human eye can't detect infra red or ultra violet.
2007-03-01 19:22:30 · answer #5 · answered by Anonymous · 1⤊ 0⤋
On the high end of the spectrum by violet is ultraviolet, and on the low end by red is infrared.
2007-03-01 19:22:38 · answer #6 · answered by consumingfire783 4 · 1⤊ 0⤋
Infra red - next to red and ultra violet, next to violet
2007-03-01 19:35:05 · answer #7 · answered by rosie recipe 7 · 0⤊ 0⤋
You mean invisible not invisable, and disregard not disreguard.
However..the answer is:-
infra red and ultra violet.
2007-03-01 19:30:17 · answer #8 · answered by Anonymous · 1⤊ 0⤋
Ultraviolet
Infrared
2007-03-01 19:21:45 · answer #9 · answered by ~Geeks Will Rule The World~ 3 · 1⤊ 0⤋
That doesn't make sense, they wouldn't be "colors" if they couldn't be seen by the naked eye. Colors are an effect of certain materials reflecting specific wavelengths of light.
2007-03-01 19:22:43 · answer #10 · answered by Anonymous · 2⤊ 1⤋