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This produces an absorption spectrum, which has dark lines in the same position as the bright lines in the emission spectrum of an element. Bohr’s model revolutionized the understanding of the atom but could not explain the spectra of atoms heavier than hydrogen.
A spectral line is a weaker or stronger region in an otherwise uniform and continuous spectrum. It may result from emission or absorption of light in a narrow frequency range, compared with the nearby frequencies. Spectral lines are often used to identify atoms and molecules.
20 Νοε 2014 · Continuous. Emission or Bright Line. Absorption or Dark Line. Three types of spectra: continuous, emission line and absorption. (Credit: NASA's Imagine the Universe) Each element in the periodic table can appear in gaseous form and will produce a series of bright lines unique to that element.
11 Απρ 2022 · The light from an astronomical source can consist of a continuous spectrum, an emission (bright line) spectrum, or an absorption (dark line) spectrum. Because each element leaves its spectral signature in the pattern of lines we observe, spectral analyses reveal the composition of the Sun and stars.
26 Ιουν 2023 · These lines are called spectra and correspond to fingerprint wavelengths (symbol for wavelength is \(\lambda\)) for a specific element. Figure \(\PageIndex{5}\) illustrates how the light from excited electrons can be diffracted to produce line spectra for the elements of hydrogen, helium, and iron.
A dark line, or absorption spectrum, consists of a series or pattern of dark lines—missing colors—superimposed upon the continuous spectrum of a source. A bright line, or emission spectrum, appears as a pattern or series of bright lines; it consists of light in which only certain discrete wavelengths are present.
2 Ιουλ 2021 · The result is an absorption spectrum: a rainbow with dark absorption lines. Emission Spectra: The same gas can glow, giving off very specific colors to form an emission spectrum with bright lines known as emission lines.
