Radiation from Particles Falling into Black-Holes

The electromagnetic radiation emitted when a charged particle falls into a neutral Schwarzschild black-hole is calculated. For zero angular momentum fall, a system of N electrons emits 10 times as much electromagnetic radiation as gravitational radiation. This ratio is reduced for particles with a larger mass to charge ratio than the electron. For particles in a spiraling circular orbit the energy emitted is the same in the charged and uncharged cases but the spiral time is much shorter for a charged particle. The linearly falling or orbiting charged particle represents a new radiation mechanism for black-holes. The spiral time for uncharged particles of physical interest emitting gravitational radiation is found to be prohibitively long. Such processes, discussed in the literature, essentially never take place. Key words: black-holes - gravitational radiation - electromagnetic radiation