- #1

QuantumJG

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## Homework Statement

Ok I'm going through last year's practice exam for electrodynamics and I'm stuck on a particular problem. For problem statement see attachment.

q5a part i is fine but I'm confused with the other parts.

## Homework Equations

[tex]\Lambda_{\nu}^{\mu}=\left[\begin{array}{cccc}

\gamma & -\beta\gamma & 0 & 0\\

-\beta\gamma & \gamma & 0 & 0\\

0 & 0 & 1 & 0\\

0 & 0 & 0 & 1\end{array}\right],\: j^{\mu}=\left(c\rho,\mathbf{j}\right)[/tex]

## The Attempt at a Solution

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