Eli5: why do we incorporate imaginary numbers in various physics equations.

Question

Eli5: why do we incorporate imaginary numbers in various physics equations.

In: 19

Answer 1

Often the problem with be entirely represented using real numbers, and the solution will be entirely represented in real numbers. You probably could solve the problem using only real numbers (at least most of the time), but if we use complex numbers it makes the problem easier to solve.