how many colors
It is the international convention that the spectrum for normal references is to be divided into seven V I B G Y O R colors. A Bush man has more than 12 names for shades of green, the Escimo has more than 12 names for shades of white. But in the spectroscopy it is known that each element has its own spectral line. Thus there are as many colors as there are elements available freely in the SUN. note: More than this, should be rightfully answered by expert in Astronomy than a lay man like myself. Source(s): Retd Geography teacher with experience in Optics labs for degree students.