Law of Refraction Convex and Concave Lenses Convex and Concave Mirrors Diamonds Mirage

1. Sections 2.3-2.5 Pages 197-211

28. Light Emission A well-cut diamond will reflect most of the light back to the observer's eye. A poorly cut diamond will reflect only a small proportion of the light that enters it. Well cut diamond - most light is reflected back to the observer. Cut too deep; pavilion is too thick - most light is lost through the side of the stone. Cut too shallow; pavilion too flat - most light is lost through the bottom of the stone.

30. Type of behaviour What happens to light striking a surface Nature of surface What else happens? Absorption Energy Transformation rough, dark, opaque some light is reflected Reflection Bounces off smooth, shiny some light is absorbed Refraction Travels through in a new direction different transparent medium some light is reflected

44. See page 208 for more details on moving the object and lens