👉 Apochromatism is a phenomenon in optical instruments that describes how light is refracted when passing through two different materials, such as glass and water. This means that when light passes from one material to another, it bends or "aprophrases" the angle of incidence. For example, if you shine light straight into a prism, the light will pass through the prism with exactly 90 degrees, but if you shine light from a different material (such as glass), the light will bend
