Familiarity with "general relativity" and "quantum optics"

[RedshiftDrift]

I am curious about the level of familiarity ACG members have with the physics of general relativity and quantum optics.

By "familiarity," I mean that you can read a paper that uses a specialized language, understand enough to know what the paper is about, and explain it at the layman's level to someone else.

(GR) I am familiar with General Relativity and associated vocabulary such as "spacetime", "relativistic addition of velocity", "gravitational redshift", "Ricci curvature", "geodesics", "energy-momentum", etc.

(QO) I am familiar with Quantum Optics and associated vocabulary such as "spontaneous emission", "stimulated emission", "Einstein's A and B coefficients", "photoelectric effect", "photon mode", "photon creation and destruction", etc.

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P.S. I am not asking if you agree with these theories, only if you can read a paper and have a general understanding of what it is about.