Donal O'Connell, a physicist at the University of Edinburgh, presents work applying scattering amplitude techniques, methods developed for particle physics collider calculations, to the problem of black hole radiation. Delivered at the Institute for Advanced Study as part of a workshop on black holes from theory to observations, the talk explains how amplitude methods originally built for gauge theory and gravity scattering can be repurposed to compute aspects of Hawking radiation and related semiclassical black hole physics. O'Connell walks through the technical machinery linking quantum field theory amplitudes to classical gravitational observables, a connection that has become central to modern gravitational wave calculations. The lecture assumes graduate level familiarity with quantum field theory and general relativity, and it sits within the broader research program connecting amplitudes, effective field theory, and strong gravity phenomena relevant to black hole physics and observational tests of general relativity.