I need to explain Hawking radiation to my classmates for a homework. Could I use this informal explanation? (unfortunately without math). Correct me if I need to change/add something:
Quantum fluctuations on vacuum generates pairs of entangled virtual particles that “exists” only for a brief moment of time and then annihilate each other, turning into nothing, without violating any law. But when this pair is created NEAR (out) the event horizon of a black hole which has enormous gravitational force, those virtual particles are “splitted” apart and actually become “real” particles with real mass and energy, and one of them goes inside the black hole while the other one has gained sufficient energy to leave the attraction and escape. As the “real” particles pair separation was produced by the black hole's gravitational energy, and only “half” of the energy used was “recovered”, the escape of one of the particles lowers the total mass of the black hole, causing them to “evaporate” on a long period of time.