[Free Registration/Login may be required to access all resource tools.] Students investigate behaviors of waves, including interference, reflection, refraction, and diffraction.

Access hundreds of teacher-tested, practical physics lessons on this well-organized, illustrated site. Find just the right demonstration, attention-grabber, or lab for any physics teaching objective at your fingertips.

[Free Registration/Login may be required to access all resource tools.] Explore the characteristics and behaviors of energy transferred by transverse waves.

Light is a form of energy. We see it in many different forms all around us. It's the sunlight that pours through your bedroom window and wakes you up. Images and in-depth information on light can all be accessed in this article.

Kids learn about the science of light. Energy made of waves and particles called photons traveling at the top speed in the universe. What is refraction? The difference between transparent, translucent, and opaque.