This resource provides information about light and shadows. In addition, there is a short quiz that can be taken.

[Free Registration/Login Required] This flipchart introduces fifth graders to the science of light. Principles such as transparent, translucent, opaque, reflection, and refraction are covered. Concave and convex mirrors and lenses are...

This lesson will explain why objects have different colors.

Streak is the color of the powder of a mineral. This page discusses the importance of streak when identifying minerals.

[Free Registration/Login Required] This unit introduces the relationship between light, an object and the formation of shadows.

An image of "Cup and Cover", created by David Altenstetter, c. 1600 (Silver and silvergilt, with translucent enamel arabesques, height 22,5 cm).

In later Greek, a lantern. Two bronze lanterns, constructed with nicety and skill, have been found in the ruins of Herculaneum and Pompeii. One of them is represented in the annexed woodcut. Its form is cylindrical. Within is a bronze...