Light Refraction Through a Rectangular Prism - Physics Diagram #233172 (License: Personal Use)

This schematic shows a beam of parallel light rays striking a rectangular transparent medium (e.g., glass) at an angle. Upon entry, the rays bend toward the normal due to increased optical density; upon exit, they bend away from the normal, emerging parallel to the original direction but laterally displaced. The diagram clearly illustrates the principles of refraction, Snell’s law, and the absence of angular deviation in a parallel-sided slab.

Used in educational physics content, optics tutorials, or STEM curriculum pages to explain refraction in plane-parallel media; matches user intent for understanding basic light behavior in transparent materials.