Account for the production of emission and absorption spectra and compare these with a continuous blackbody spectrum

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Account for the production of emission and absorption spectra and compare these with a continuous blackbody spectrum

  • Continuous Spectrum: A spectrum in which all wavelengths are present.
  • Emission Spectrum: Spectrum produced by hot, incandescent gases at low density.
  • Emission spectra have the appearance of a largely black rectangles with distinct coloured lines/bands.
  • Emission spectra are produced when electrons of atoms drop down to a lower energy level, after first being excited to a higher level, and release photons of a particular frequency
  • Molecules tend to emit band spectra.
  • Absorption Spectrum: Spectrum produced by a cool, non-luminous gas being placed in front of a continuous spectrum source.
  • Absorption spectra have the appearance of continuous spectra with discrete dark lines.
  • An absorption spectra of an element is the negative of the emission spectra for the same element.