(adsbygoogle = window.adsbygoogle || []).push({}); My question is simple:Are there any massless

My question is simple:Are there any massless particles?

Because I've now found out that the photon, which I always thought to be massless, actually has an extremely small amount of mass. It is something along the lines of a billionth of a billionth of an eV. Anyway, now I'm wondering whether there are any actual and true massless particles.

Thanks,

Al

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# My question is simple: Are there any massless

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