Kundt spacetime | Wikipedia audio article
Channel: wikipedia tts
Date: 30/12/2018

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Kundt_spacetime





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SUMMARY
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In mathematical physics, Kundt spacetimes are Lorentzian manifolds admitting a geodesic null congruence with vanishing optical scalars (expansion, twist and shear).  A well known member of Kundt class is   pp-wave.  Ricci-flat  Kundt spacetimes in arbitrary dimension are algebraically special.  In four dimensions Ricci-flat  Kundt metrics of Petrov type III and N are completely known.  All VSI spacetimes belong to a subset of the Kundt spacetimes.