The relation that describes an instability of an interface between two fluids of different densities which occurs when the lighter fluid is pushing the heavier fluid is named after which British physicist who passed away in 1975?
Rayleigh–Taylor instability The Rayleigh–Taylor instability, or RT instability (after Lord Rayleigh and G. I. Taylor), is an instability of an interface between two fluids of different densities which occurs when the lighter fluid is pushing the heavier fluid. Examples include the behavior of water suspended above oil in the gravity of Earth, mushroom clouds like those from volcanic eruptions and atmospheric nuclear explosions, supernova explosions in which expanding core gas is accelerated into denser shell gas, instabilities in plasma fusion reactors and inertial confinement fusion.
Knott's equations In geophysics, Knott's equations were the first equations to describe the amplitudes of reflected and refracted waves generated at non-normal incidence upon an interface. They were derived in 1899 by the British geophysicist Cargill Gilston Knott using displacement potential functions and describe the same phenomenon that the Zoeppritz equations describe in terms of amplitude displacements.