Blue is a color that lies between violet and green on the spectrum of visible light.
Tell me more about the spectrum of visible light
Well... my understanding is that light is electromagnetic radiation.
ok are there any colors outside the spectrum?
In a manner of speaking. Wavelengths less than 390nm or greater than 700nm wouldn't really have a color.
ok thats alot of techy information for a non techy guy but good to know :)
Heh. Well people just see color in different ways. It's quite personal. But color doesn't mean much if it is outside the visible spectrum.
can we relate the rainbow to a spectrum? since there are so many colors at once being displayed
Visible spectrum
The visible spectrum is the portion of the electromagnetic spectrum that is visible to the human eye. Electromagnetic radiation in this range of wavelengths is called visible light or simply light. A typical human eye will respond to wavelengths from about 380 to 740 nanometers. In terms of frequency, this corresponds to a band in the vicinity of 430–770 THz.
The spectrum does not contain all the colors that the human eyes and brain can distinguish. Unsaturated colors such as pink, or purple variations like magenta, for example
The main source of information about celestial bodies and other objects is visible light, or more generally electromagnetic radiation. Observational astronomy may be categorized according to the corresponding region of the electromagnetic spectrum on which the observations are made. Some parts of the spectrum can be observed from the Earth's surface, while other parts are only observable from either high altitudes or outside the Earth's atmosphere. Specific information on these subfields is given below.
Observational astronomy Radio astronomy.
Radio astronomy uses radiation with wavelengths greater than approximately one millimeter,