A hollow triangular glass prism with very thin walls and apex angle \(A\) is filled with a liquid of index of refraction \(n_l\). A ray of monochromatic light in air (\(n_{\text{air}} = 1.0\)) enters the left face of the prism at a fixed angle of incidence, travels through the liquid, and exits through the right face, deviating downward toward the base by a total angle \(\theta\). If the liquid is replaced with a denser liquid that has a greater index of refraction \(n_l' > n_l\), how does the total deviation angle \(\theta\) change, and why?