Lenses and Optical Instruments
A lens forms an image by bending many rays in a coordinated way. A ray diagram gives the geometry, while the thin-lens equation predicts distances within the paraxial model. This lesson supports Chapter 22 of High School Physics. Converging and diverging lenses treat rays differently A converging lens brings parallel rays toward a focal point. […]
Reflection, Refraction, and Color
A mirror redirects light, a glass block bends it, and a prism spreads colors because light interacts with boundaries and materials in predictable ways. This lesson supports Chapter 21 of High School Physics. Reflection follows equal angles The angle of reflection equals the angle of incidence, with both angles measured from the normal line. A […]
