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🪐intro to astronomy review

key term - Spectral line

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Definition

A spectral line is a specific wavelength of light emitted or absorbed by an element, often visible as a bright or dark line in a spectrum. Spectral lines are crucial for identifying the composition and properties of astronomical objects like stars, including our Sun.

5 Must Know Facts For Your Next Test

  1. Spectral lines are produced when electrons in atoms transition between energy levels, resulting in the emission or absorption of photons at specific wavelengths.
  2. The analysis of spectral lines from the Sun helps astronomers determine its chemical composition, temperature, and density.
  3. The study of solar spectral lines reveals information about the solar cycle and activity such as sunspots and solar flares.
  4. Dark (absorption) lines in the solar spectrum are known as Fraunhofer lines, named after the physicist who first studied them extensively.
  5. Changes in the intensity and position of spectral lines can indicate magnetic fields and motions within the Sun's atmosphere.

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