Fundamentals of Light and Lasers: Optical Density

This lecture, presented by Gary Beasley, covers the basics of optical density as the concept relates to the fundamentals of light and lasers. In 7 minutes, Beasley covers the definition of optical density (a measure of how much light can be transmitted through a specimen or substance), provides various fundamental facts concerning optical density, and explains the process of optical density in action. Beasley then uses real life examples - such as the optical density of safety glasses - to bring the topic home.