Dispersion of light and radio: what they have in common

1. Step 1. Dispersion of light — is used in — Prism. Different colours are refracted differently.
2. Step 2. Prism — is part of — Spectroscope. A prism.
3. Step 3. Spectroscope — is used in — Spectral lines. They are observed with a spectroscope.
4. Step 4. Spectral lines — is used in — Atomic clock. The second is defined by the frequency of an atomic transition.
5. Step 5. Atomic clock — has part — Oscillator. A quartz oscillator is tuned to the atoms.
6. Step 6. Oscillator — is part of — Radio. A carrier frequency oscillator.

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