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Excitation of Hydrogen Atoms

The simplest atom is hydrogen.The hydrogen atom has one proton and one electron.The energy levels are given byrelative to ionisation energyAt the ground state n = 1For the next excited state n = 2, then n = 3 etc..When hydrogen de-excites from n1 to lower energy level n2, the energy of the emitted photon is given by:

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Specification: AQA Physics (7407), AS-level, 3.2.2.2 Collisions of electrons with atoms and 3.2.2.3 Energy levels and photon emission. Topic: The Photoelectric Effect.

Key terms in this lesson

Phase difference
The difference, measured in radians or degrees, between the phases of two oscillating points or waves.
Interference
The formation of points of cancellation and reinforcement where two coherent waves overlap and superpose.

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