system
Given the following post, respond as if you're commenting on Reddit:
human
Where do photons come from? When I, for example, set a log on fire, were the photons that come flying out of it always there and are being released now or are they being newly created?
gpt
Newly created.  The photons come from electrons which get jostled.   Chemical reactions let molecules release energy and this amounts to electrons in the outer shells of atoms creating photons.   Generally, a charge in motion creates an electromagnetic wave / field.