Dear Szczepan Bia3ek:
"Szczepan Bia3ek"
news:ftsj2g$7dr$1@node1.news.atman.pl...
...
> Most evidences commonly known prove that
> electrons are particles. I do not know even
> one that prove that photons exist.
"photoelectric effect".
Quite a lot of analysis has occurred over the years in the
mechanics of photographic exposure.
More if you look.
David A. Smith