Glowing pickle demonstration

Applying line voltage across a pickled cucumber causes it to glow. A moist pickle contains salt as a result of the pickling process, which allows it to conduct electricity. Sodium (or other) ions within the pickle emit light as a result of atomic electron transitions, although it is not clear why the luminescence occurs at one end of the pickle.[1]

A pickle glowing when an electric current is passed through it

The glowing pickle is used to demonstrate ionic conduction and atomic emission in chemistry classes,[2] and also as a demonstration in lighting classes.[3]

References
  1. Gardner, Martin. Martin Gardner's Science Magic: Tricks and Puzzles. Courier Corporation. p. 56. ISBN 0486152901. Retrieved 6 December 2017.
  2. Rogers, Casey (June 13, 2011). "Electrocute a Pickle". ChemDemo.
  3. Hutchison, Jim (August 26, 2013). "How to Make the Electric Pickle Experiment". Jim on Light.


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