Hey,
So from what i have been reading its basicaly different units of measure for light.
Basically Kelvin is kind of the same for light as it is for temperature. You probably have heard of "absolute zero" or "zero degrees Kelvin" right? Zero degrees Kelvin is -253 degrees Celsius or so. I just read (and I will post the links below), that it seems that it is based on the color of a carbon rod when it is heated up and measured in Kelvin . So when you heat carbon to 3,200 degrees Kelvin it glows orange, at 4,800 degrees Kelvin its green and at 5,600 degrees Kelvin its blue. Cool huh!
As far as nanometers go, I know that one very well. So light is small and some smart people feel its a ray and some a particle. Either way light is divided into many units. Each wavelength also has an actual length that we describe with as wavelength. A group of wavelengths is called a spectrum like that from a prism we all played with in science class. Angstroms are the smallest unit of measure for light, then nanometers and then microns which is not really used as its kind of big for light. How small is light? Lets assume its a particle as its easier to visualize. Well, a cross section of a hair is 25 microns or so. Slice it up into 25 even parts and you have one micron. Take that and divide it by 1000 and its a nanometer (divide once more by 10 and its an angstrom).
Visible light is about 400 - 770 nanometers; 400 being the blue (UV) and 700 being the red (IR).
Here is a link I found a good explaintion on Kelvin scale:
http://www.videomaker.com/article/8933/
Here is a fun one with some kid (and adult for geeks like me) that explains (if you don't do the experiments) and shows the spectrum in nanometeres or "nm":
http://sci-toys.com/scitoys/scitoys/light/cd_spectroscope/spectroscope.html
And here is a technical on on nanometers:
http://acept.asu.edu/PiN/rdg/color/color.shtml
Hope if helps you or someone, it was good research!
Lil Elvis
