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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.
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.
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.
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.
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.
Representative Visible-Light Emission-Line Spectra of Various Chemical Elements. Hydrogen (1 electron) Helium (2 electrons) Carbon (6 electrons) Nitrogen (7 electrons) Oxygen (8 electrons) Neon (10 electrons) Argon (18 electrons) Iron (26 electrons) Krypton (36 electrons) Xenon (54 electrons) Mercury (80 electrons)
Each element has its own line spectrum and a line spectrum can be used to identify different elements. The line spectrum is like a fingerprint and is specific for each element. If you have ever let food boil over when cooking, you will notice the gas flame will turn a bright yellow-orange.
