A dependence of photoproduced dijets.

We present a measurement of the [ital A] dependence of [ital k][sub [ital T][phi]], the out-of-plane component of the dijet transverse momentum, in dijet events produced with a real photon beam. We also present the same measurement for dijets produced from pion-nucleus collisions in our detector. Both data sets are taken at a mean [radical][ital s] of 21 GeV in the [ital p][sub [ital T]] range 3--7 GeV/[ital c]. A clear [ital A] dependence of comparable magnitude is seen in both processes. The energy dependence of the nuclear behavior is also extracted.