Using slices to construct a two-dimensional embedding of a construction named for this physicist creates the slightly confusingly named Flamm’s paraboloid. This scientist’s namesake equation models radiative transfer in mediums that absorb and emit radiation. This physicist’s namesake metric was developed from the first exact solution of the (*) Einstein field equations and assumes the charge, (10[1])angular momentum, and cosmological constant of a spherical mass is zero. A distance named for this physicist is equal to two times the gravitational constant times mass divided by the speed of light squared. For 10 points, name this physicist who names the first defined radius (10[1])that any astronomical body must be smaller (-5[1])than to be a black hole. ■END■ (0[1])