IB Physics HL E 1 3 Atomic Energy Levels Questions

Use HL atomic spectra to explain discrete energy levels, photon emission and absorption, and why spectral evidence changed the atomic model.

Exam points

explain that discrete atomic energy levels produce line spectra when electrons move between allowed levels
relate an electron transition to photon frequency, wavelength and energy using the energy difference and E=hf or E=hc/λ
interpret emission or absorption spectra as evidence for quantized atomic energy levels and the limits of earlier atomic models

[Maximum number: 3]

The diagram represents the three principal spectral lines in the visible region of the spectrum of atomic hydrogen.

The electron in the hydrogen atom can only occupy certain allowed energy levels.

Outline how the spectral lines provide evidence for the existence of these energy levels.

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