this post was submitted on 14 Jul 2025
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The energy from nuclear reactions can be astonishingly large (compared to, say, chemical reactions).
But atoms are really, really, really small.
people with good vision can probably see a single gold atom, I seem to remember that one useless fact about the smallest things we can see
A single atom of gold is far too small for any photon in the visible spectrum to interact with.
A single atom of gold is 0.2 nanometres (a nanometre is an incredibly small thing and a gold atom isn't even half of 1% of that), meanwhile the wavelength of blue light (The smallest wavelength of visible light) is a hulking 380 nanometres. No matter how much you zoom in you would never see anything a single atom is just too small to interact with light.
That's incorrect
single atoms can, and do, interact with optical photons.
https://arxiv.org/abs/2410.19671 https://www.nature.com/articles/ncomms13716
And the entire field of super resolution microscopy relies on small things (e.g., molecules) interacting with light.