Refraction of Light Through a Rectangular Glass Slab - Physics Diagram #3498590 (License: Personal Use)

This black-and-white schematic depicts a light ray entering a rectangular transparent medium (e.g., glass), refracting at the first interface, traveling straight through the medium, and refracting again at the second interface. The emergent ray is parallel to the incident ray but laterally displaced; the dashed line indicates the original undeviated path for comparison.

Used in high school or introductory college physics curricula to teach Snell’s Law and lateral displacement in optics; supports lessons on wave behavior, refractive index, and ray diagrams.