Atoms and light

Neon lights and other discharge lamps


Produce light by bombarding atoms with electrons. See how the characteristic spectra of different elements are produced and configure the energy states of your own element to produce light of different colors.

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Although this Java simulation can be run on your device, we recommend that for the better user experience, you run it on a device with a wider screen.

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Absorption and emission of light


Electrons can change position by receiving energy (mainly light energy). The atom absorbs the incoming energy and returns it to its surroundings in the following order. Electrons that have risen to a high level drop back to their original position. At that time, they emit light energy.
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Quantum of light


Move the arrow and observe how the wavelength, energy and emitted photons change.
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