While it might appear white, yellow, or red at times, the Sun actually emits light of nearly every color, as shown in this beautiful spectral image.
on a solar spectrum. Described as “the first alien element,” helium was discovered on Earth about a decade after scientists found it in spectral analysis of the Sun.
Aided by a spectroscope, which operates like a prism, absorption lines long puzzled scientists. The black lines interrupting colors were confounding for decades. It wasn’t until 1859 when Gustav Kirchoff and Robert Bunsen observed that when certain chemicals were heated in Bunsen’s burner, bright emission lines appeared at the precise wavelengths where dark lines appeared in the Sun’s spectrum“Emission lines refer to the fact that glowing hot gas emits lines of light, whereas absorption lines refer to the tendency of cool atmospheric gas to absorb the same lines of light. When light passes through gas in the atmosphere some of the light at particular wavelengths is scattered resulting in darker bands.
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