The Spectrum of an Ordinary Main-Sequence Star Is a

Multiple Choice

The spectrum of an ordinary main-sequence star is a

A) continuum of colors, crossed by brighter lines caused by emission from the hot atoms and molecules on the star's surface.
B) smooth continuum of color, peaking at a specific wavelength whose position depends on the star's surface temperature.
C) series of emission lines, mostly from hydrogen, the major constituent of stellar surfaces, that occasionally overlap to produce sections of continuous color.
D) continuum of colors crossed by dark absorption lines caused by absorption by cooler atoms and molecules at the star's surface.