Final answer:
A Schwarzschild black hole is a nonrotating black hole with no electric charge. It is named after Karl Schwarzschild who first mathematically demonstrated the existence of black holes and determined the size of the event horizon.
Step-by-step explanation:
A Schwarzschild black hole is a nonrotating black hole with no electric charge. It is named after the German scientist Karl Schwarzschild who first mathematically demonstrated the existence of black holes and determined the size of the event horizon for a nonrotating black hole. The event horizon, also known as the Schwarzschild radius, is the boundary beyond which nothing, not even light, can escape the gravitational pull of the black hole.