How are perceived colors affected by the width of the component color bands? Here is the spectrum 1 of my Powerbook's lcd:
The red part has a major 607 nm, surrounded by at least 10 much fainter lines. The green light comes from a wide doublet near 540 nm. and the blue component is a wide band. A lone indigo line near 432 nm concludes the spectrum. These do not represent the R, G and B signals from the computer though. All three computational primaries contained some of all the lines and bands.
Conversely, the best isolation 2 of the red, green and blue portions of the spectrum were at the following settings:
1. The Project Star spectroscope has about a 2.5 nm slit width. Exposure on a Nikon 950 camera was 2 sec. @ f/4.
2. All three areas of the spectrum, red, green and blue, remained partially illuminated at all color settings.