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Physics A: Problem Set 24: Atomic spectra

recommended reading

High Marks: 5:8–5:10
Barron's Let's Review: 13.5 Models of the atom
physics.info: n/a
Wikipedia: Bohr model, Energy level
Khan Academy: Bohr's model of the hydrogen atom
YouTube: Why is glass transparent?
Mr. Machado: 02 Spectra and Energy Level Transitions

sample problem

  1. In a mercury atom, as an electron moves from energy level i to energy level a, a single photon is emitted.
    1. Determine the emitted photon's energy in…
      1. electronvolts
      2. joules
    2. Determine the emitted photon's…
      1. frequency
      2. wavelength
    3. What kind of electromagnetic radiation is this?

homework

  1. An excited electron in a hydrogen atom falls from then = 6 energy level to then = 3 energy level. Determine the following quantities for the emitted photon:
    1. its energy in electronvolts
    2. its energy in joules
    3. its frequency in hertz
    4. its wavelength in meters
    5. its momentum in kilogram meters per second
    6. its classification in the electromagnetic spectrum