2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/36007Recently a simple solution of the vacuum Einstein-Maxwell field equations was given describing a plane electromagnetic shock wave sharing its wave front with a plane gravitational impulse wave. We present here an exact solution of the vacuum Einstein-Maxwell field equations describing the head-on collision of such a wave with a plane gravitational impulse wave. The solution has the Penrose-Khan solution and a solution obtained by Griffiths as separate limiting cases.3 pages, TeX, no figures, to appear in Lett. Math. PhysGeneral Relativity and Quantum Cosmologytext