NEWTONIAN CHAOS+HEISENBERG UNCERTAINTY=MACROSCOPIC INDETERMINACY

The specific example of an electron orbiting in the field of a charged sphere and a superimposed uniform magnetic field is used to illustrat e that in classically chaotic systems, irreducible uncertainties requi red by the Heisenberg principle are amplified exponentially to the mac roscopic level in short times. According to the Copenhagen interpretat ion of quantum theory irreducible quantum uncertainties have led to qu antum indeterminacy on a macroscopic scale in interesting times.