Question

can someone please explain "charge is invarient" in simple terms. ​

Answer 1

Answer:

Since charge is a Lorentz invariant, it's an easy example to start with. Because charge is invariant, we might also imagine that charge density ρ was invariant. ... This means that knowledge of the charge density ρ in one frame is insufficient to determine the charge density in another frame.

Answer 2

Explanation:

Since charge is a Lorentz invariant, it's an easy example to start with. Because charge is invariant, we might also imagine that charge density ρ was invariant. ... The factor ρ0 is an invariant, since it in turn breaks down into charge divided by rest-volume.

I hope this may help you

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