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University of Colorado, Department of Physics
6.0.190.4
phet.colorado.edu
Freeware
54 people
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Review

Neon Lights & Other Discharge Lamps is a physics simulation model. It deals with how this kind of lamps operate on molecular level. The simulation shows a circuit where a power source is connected to a couple of metal sheets. A single atom is placed in between those sheets. Electrons are bombarded from one end of the circuit to the other, and, on their way, they collide with the atom. By default, the atom is hydrogen, which releases photons with little energy requirements when electrons collide with it. These released photons are what we perceive as light.

In this simulation you can change the atom to neon, sodium, and mercury and you can also drag the atom to any place inside the vacuum. The purpose of the simulation is for you to see how different atoms react differently to electron collisions. Some require more collisions to release photons and they have to be placed in different parts of the vacuum. You can increase the voltage of the circuit and also release a single electron at a time or opt for a continuous stream of electrons. Additionally, you can see the process with multiple atoms, which really illustrates the process better. As a bonus, the application comes with a picture of real-life discharge lamps.
  • It is illustrative.
  • No installation required.
  • It has an image of real discharge lamps for reference.
  • None.

Reviewed by: José Fernández

Reviewer rating:

Reviewed: Last year

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One atom One atom Multiple atoms Multiple atoms About window About window

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