Science

Is there *any actual example* of infinity in physics?

I’m reading about Ramanujan’s summation method to assign a value to a divergent series (eg, 1 + 2 + 3 + 4 + … = -1/12), and it seems to me that *every time* infinity shows up in equations, it’s nature’s way of telling physicists that their model is wrong

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the closest actual examples are electron's magnetic moment and some things from quantum field theory, but nothing hard proven yet 😵‍💫

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Could you please elaborate on the electron’s magnetic moment? I haven’t found anything that points to an infinity

not an expert, but early in calculations of the electrons' interaction with magnetic fields, integrals that point to infinity appear, and to deal with it, you'd use renormalization. interesting discussion on this here.

not an expert, but early in calculations of the electrons' interaction with magnetic fields, integrals that point to infinity appear, and to deal with it, you'd use renormalization. interesting discussion on this here. https://physics.stackexchange.com/questions/395436/intuition-on-magnetic-dipoles-and-magnetic-moment