of the interior of a Schwarzschild black hole, thereby permitting a classical peek at the local geometry inside the event horizon, the uniform electromagnetic plane wave; this spacetime is foliated by spacelike hyperslices which are isometric to , the wave of death is a gravitational plane wave exhibiting a strong nonscalar null curvature singularity, which propagates through an initially flat spacetime, progressively destroying the universe, homogeneous plane waves, or SG11 plane waves (type 11 in the Sippel and Gönner symmetry classification), which exhibit a weak nonscalar null curvature singularity and which arise as the Penrose limits of an appropriate null geodesic approaching the curvature singularity which is present in many physically important solutions, including the Schwarzschild black holes and FRW cosmological models. See also Gravitational wave Newman–Penrose formalism Notes References See Section 24.5 See Section 2-5 Yi-Fei Chen and J.X. Lu (2004), "Generating a dynamical M2 brane from super-gravitons in a pp-wave background" Bum-Hoon Lee (2005), "D-branes in the pp-wave background" H.-J. Schmidt (1998). "A two-dimensional representation of four-dimensional gravitational waves," Int. J. Mod. Phys. D7 (1998) 215–224 (arXiv:gr-qc/9712034). Albert Einstein, "On Gravitational Waves," J. Franklin Inst. 223 (1937). 43–54. Nathan Rosen, "Plane Polarized Waves in the General Theory of Relativity," Phys. Z. Sowjetunion 12 (1937). External links Pp-wave on arxiv.org Exact solutions in general relativity