  Ultra-relativistic heavy-ions carry strong electromagnetic and nuclear
fields. Interactions between these fields in peripheral nucleus-nucleus
collisions can probe many interesting physics topics. This presentation will
focus on coherent two-photon and photonuclear processes at RHIC. The rates for
these interactions will be high. The coherent coupling of all the protons in
the nucleus enhances the equivalent photon flux by a factor Z^2 up to an energy
of ~3 GeV. The plans for studying coherent interactions with the STAR
experiment will be discussed. Experimental techniques for separating signal
from background will be presented.
