As the medium becomes denser, the angle of refraction typically decreases. This phenomenon is described by Snell's law, which states that the angle of refraction is inversely proportional to the refractive index of the second medium. The refractive index is a measure of how much the speed of light is reduced when it passes through a particular medium. Therefore, as the refractive index (and density) of the medium increases, the angle of refraction becomes smaller.
