👉 Stereoscopism is a concept in the field of physics and astronomy that describes how light behaves when it travels through two different media, such as air and glass. This phenomenon occurs because light can be bent or refracted by different materials, depending on their properties, like density, velocity, and temperature. For instance, if you have a prism (a type of lens), the material in the prism is denser than the surrounding air, causing the light to bend when it enters the prism
