An article details everything you need to know about celebrating Kwanzaa at your school. An opening-day ceremony starts the seven-day holiday celebration followed a daily routine that includes a greeting, candle lighting, reciting an...

An illustrated article helps students understand the concept of reflection of images and the differences in reflection with different optical devices.

Do you know why the sky is blue? Article defines scattering and how it works. Explains the difference between the scattering of light and reflection or refraction.

To understand how bounded waves behave and how reflection of waves affects the wave components.

A description of the early lights used in lighthouses and how these lights evolved into what they are today. Explains the contributions of Fresnel to the development of these lights; discusses the Fresnel orders.

An informative site that explains Value as an element of art using examples of Rembrandt's work. This is a good juxtaposition between the works "Night Watch," and "The Anatomy Lesson," by Rembrandt.