Wikipedia:Picture of the day/October 2005

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A monthly archive of Wikipedia's featured pictures

These featured pictures previously appeared (or shall appear) as Picture of the day as scheduled below. You can add the automatically updating Picture of the day to your userpage or talk page using {{pic of the day}} (text version) or {{POTD}} (short version). For instructions on how to make custom POTD layouts, see Wikipedia:Picture of the day.

October 1

Picture of the day

Plasma lamp electrode and plasma stream

The central electrode of a Plasma lamp, showing a glowing blue plasma streaming upwards. The colors are a result of the radiative recombination of electrons and ions and the relaxation of electrons in excited states back to lower energy states. These processes emit light in a spectrum characteristic of the gas being excited.

Photo credit: PiccoloNamek
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