Eli5 How can massless light propel a solar sail?

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I know that momentum is a potential to change energy not necessarily involving mass. But, could someone please explain what force is actually imparted? I’m stuck thinking of the sail like a battery that was just given a charge, but has no propulsion system to provide the charge to.

In: Physics

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Anonymous 0 Comments

The solar wind isn’t actually light. It’s a mixture of charged electrons, protons and alpha particles (two protons and two neutrons), all of which have mass, although they are very small

Edit: Fixing spelling because the latest update seems to have slightly broken comments and I can’t see what I’m writing

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