Examples of the Doppler dimming effect on the Mg ii k line. Shown is the dimming factor versus radial velocity, where the dimming factor is defined as the ratio of the line integrated intensity at a given velocity to the intensity at zero velocity. The plots correspond to models with D = 1000 km, T = 8000 K, p = 0.1 dyne cm^-2, and two different turbulent velocities of 5 km s^-1 (full line) and 20 km s^-1 (dashed line).