What is line spectra? - Quora

What does a star's dark line spectrum reveal? - Quora

What causes spectra of atoms to contain discrete “lines”? - Quora

What is line spectra? - Quora

What is “spectrum” and “line spectra”? - Quora

What causes spectral lines? - Quora

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What causes spectral lines? - Quora

What is line spectra? - Quora

What is meant by the multiplicity of spectral lines? - Quora

Why do stars have absorption spectrum but not emission spectrum? - Quora

What is the color of light based on? - Quora

Is the electromagnetic spectrum just light in different wave lengths? - Quora