Why do scientists add infinity to things like bringing a charge from infinity, putting something on infinity, making an image on infinity when it’s just a concept and doesn’t actually exist.

Question

And also get mad at it because it came in their equation so it must hat some sort of mistake.

In: Physics

Answer 1

Reverse the idea. If a charge is moved from you to be infinitely far away, its electical field, asymptotically approaching zero, becomes zero. That’s a handy property to have for your next equation.