E_{t} = E_{t 0} \exp [i ω (t - \frac{x \sin γ + z \cos γ}{v_{2}})] = E_{t 0} \exp [- \frac{i ω z \cos γ}{v_{2}}] \exp [i ω (t - \frac{x}{v_{2} / \sin γ)})]

${E_t=E_{t0} \exp\bigg[i\omega \bigg(t- \frac{ x \sin \gamma + z \cos \gamma}{v_2}\bigg) \bigg] = E_{t0} \exp \bigg[-\frac{i \omega z \cos\gamma}{v_2} \bigg] \exp \bigg[i\omega \bigg(t - \frac{x}{v_2/ \sin \gamma)}\bigg) \bigg]}$

Error