What conditions produce a dark-line spectrum?

Answer 1

An absorption spectrum can tell the astronomer or physicist what elements are in the starlight being observed. A diffraction grating is used to split the incoming light into a spectrum of colors. Sodium, for example, causes dark Fraunhofer lines at known points in the visible spectrum. Helium was discovered in the solar spectrum by Bunsen and Kirchoff using this technique. Hence the name derived from Helios for the Sun.

Answer 2

The conditions that produce a dark line spectrum are: a source of wideband energy behind an atom. The energy washes over the atom and the atom absorbs energy associated with electron level resonance. This absorption by the atom creates the dark lines in the spectrum because the energy at these lines has been absorbed by the atoms electrons absrbing the energy and jumping to higher atomic levels.

Answer 3

A dark-line spectrum, also known as an absorption spectrum, is produced when light passes through a cooler, low-density gas or plasma and is absorbed by specific elements or molecules. The dark lines in the spectrum correspond to the wavelengths of light that have been absorbed by the gas, indicating the presence of specific elements or molecules in the gas.