As electrons move from inner to outer levels energy is absorbed. When the electrons fall back from the excited state to the ground state, energy is emitted. This energy is described by the term photon which means a small packet of energy, equal to Planck's constant x frequency. The Rydberg equation allows calculation of the energy difference between two energy levels.

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As electrons move from inner

As electrons move from inner to outer levels energy is absorbed. When the electrons fall back from the excited state to the ground state, energy is emitted. This energy is described by the term photon which means a small packet of energy, equal to Planck's constant x frequency. The Rydberg equation allows calculation of the energy difference between two energy levels.

Have a search for photons on this site, or on other searches