This illustrated physics tutorial serves as a step-by-step guide to drawing ray diagrams. It includes an opportunity for students to practice and check their answers.

[Free Registration/Login may be required to access all resource tools.] Students explain the ray model of light, describe the law of reflection, and investigate how images are formed from flat mirrors.

Article explaining what Digital Light Processing (DLP) technology is and how it works. Includes an animation to demonstrate the technology. (Published Fall 2007)