Question
Two answers required. In a diagram that commonly uses these two quantities as its axes, one of the boundaries is defined by singularities in the Schwarzschild metric. For 10 points each:
[10e] Name these two quantities which describe the Minkowski space. When coupled into four dimensions, these two words are combined into their namesake “continuum.”
ANSWER: space and time [accept answers in any order; accept spacetime; accept spacetime continuum]
[10h] This diagram, which uses space and time as its axes, assumes that all light rays travel at a 45-degree angle. These diagrams, which are extensions of Minkowski diagrams, are often called conformal due to their treatment of infinities.
ANSWER: Penrose diagrams [accept Carter-Penrose diagrams or Penrose-Carter diagrams; prompt on conformal diagrams]
[10m] Unlike the Schwarzschild metric, both the Reissner-Nordstrom and Kerr-Newman metrics assume that the specified body has a nonzero value for this quantity.
ANSWER: charge [accept Q]
<Ezra Santos, Physics>
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