Unit 15 · Modern Physics

Chapter 15.3

The Bohr Atom and Spectra

Heat hydrogen and it glows in a few sharp colors and no others, the same colors every time. An orbit that must hold a whole number of electron wavelengths explains every line.

in preparation · lesson 26 of 27

By the end

  1. 01Describe the atom: nucleus, electrons, isotopes, ions, and nuclear notation
  2. 02Apply the Bohr model: Coulomb force for circular motion, whole wavelengths fitting each orbit
  3. 03Read an energy-level diagram to predict the photons an atom emits or absorbs
  4. 04Identify an element from its spectrum and explain ionization energy

In unit 15

  1. 15.1Light Comes in Lumps: Blackbody Radiation and the Photoelectric Effect
  2. 15.2Photons, Compton Scattering, and Matter Waves
  3. 15.3The Bohr Atom and Spectra
  4. 15.4The Nucleus: Radioactive Decay, Fission, and Fusion
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