  We study the nuclear transparency $T$ for the exclusive reaction
$\gamma^*+A\to\rho+p+(A-1)^*$ at incident virtual photon energies $\nu \ge$ 10
GeV %where the final state of the $A-1$-nucleon system is a one-hole state of
the initial nucleus, to investigate the separate dependence on the photon
virtuality, $Q^2$ and the 4-momentum-transfer-squared to the knocked-out
proton, $t$. If the effects of color transparency are included, $T$ shows
significant variation with $t$ even for small values of $Q^2$ for fixed values
of the coherence length $l_c$, and also shows significant increase as $Q^2$ is
increased at fixed $l_c$ and $t$. The value of $T$ is found to depend strongly
on the phase space over which it is measured.
