High-Brightness, Narrow-Bandwidth Pulses: They collapsed the frequency combs into a single, ultra-bright spectral line, or “tooth,” with a bandwidth approximately one-third that of a standard ...

Studying the line spectra produced by hot gases and absorbed by cooler gases allows us to identify the elements in stars. When a gas is very hot, it doesn’t emit all wavelengths of light.

1\). Line spectra are produced when electrons move from one energy level within an atom to another energy level. \(2\). The energy levels in the atom have definite values. \(3\). Line spectra are ...