http://www.ck12.orgCHAPTER
20 Geometric Optics
Chapter Outline
20.1 Light as a Ray and the Law of Reflection
20.2 CONCAVE ANDCONVEXMIRRORS
20.3 INDEX OFREFRACTION
20.4 THINLENSES
20.5 SUMMARY
20.6 REFERENCES
FIGURE 20.1
Light refracted through water.Optics is the study of light. Geometric optics is the classical science of mirrors, glass, and lenses. It explains how
light bends in water, and how images are formed in mirrors, telescopes, microscopes, and other devices.