Optics For Dummies Pdf Jun 2026

When light passes through a tiny hole or around an edge, it spreads out slightly.

This is arguably the most important concept for understanding lenses. Refraction happens when light passes from one material to another (like from air into water or glass) and changes speed. Because it changes speed, it changes direction. optics for dummies pdf

This is the easiest way to visualize light. In this model, we treat light as straight lines called . When light passes through a tiny hole or