Can you picture someone in infrared? In this game, you try to match pictures taken of faces with a regular camera with those taken with an infrared camera. After the game, there is background information on infrared waves.

This site from Georgia State University is an indexing page for several other pages on the topic of reflection. Topics are treated in an understandable manner and utilize meaningful graphics.

Students learn two rules of reflection as it has to do with concave mirrors. These two rules will greatly simplify the task of determining the image locations for objects placed in front of concave mirrors.

This illustrated physics tutorial uses animations to attempt to explain to students why images appear.

Through illustrated examples and interactive practice problems, students learn about real and virtual images.

Learn what black holes are and the myths that surround them.

Understand the physics behind Roy G. Biv, and how rainbows are formed by drawing upon our understanding of refraction, internal reflection, and dispersion.

Illustrated diagrams in this tutorial help students understand the properties and functions of lenses.

An illustrated physics tutorial which explains the spherical aberration, an intrinsic defect with any mirror that takes on the shape of a sphere.

Students discover the four parts of the eye are the most instrumental in the task of producing images that are discernible by the brain.

A brief introduction to the physics side of farsightedness, and how lenses correct this vision defect.

A brief introduction to the physics side of nearsightedness, and how lenses correct this vision defect.

This Nobel website on the life and scientific work of Robert A. Millikan includes a biography, images, and internet resources for further reading and research. Also included are the 1923 "Presentation Speech" which praised Millikan's...

Lesson 3 of this tutorial on refraction is on concave mirrors. Content that is covered includes the anatomy of curved mirrors, reflection of light and image formation, ray diagrams, image characteristics for concave mirrors, plus more.

This interactive unit will help students to understand the basics of geometric optics. Learn what happens when light strikes the boundary between two media as well as the difference between a real and virtual image? Also explore the law...

Light travels as waves. Waves can be described by their amplitude, wavelength and frequency. The speed of a wave can be calculated from its frequency and wavelength.

Have you ever wondered why some people need glasses and others don't? It's because of the way light is focused by the lens in your eye. This lens, like magnifying glasses, eyeglasses, and contact lenses, is considered a thin lens.

The goal of this project is to measure the effectiveness of different sunscreen products for blocking ultraviolet-A (UVB) and ultraviolet-B (UVB) rays from sunlight. This project shows you how to use a UV detector to measure rays of light.

What if invisibility wasn't just the stuff of epic comic book stories? Is it scientifically possible to be invisible? In this series, creator Joy Lin tackles six superpowers and reveals just how scientifically realistic they can be. [4:33]

Site provides the article, "NASA Detects One Of Closest And Brightest Gamma Ray Bursts." Provides links to learn more about gamma rays and black holes as well as other resources.

An app for investigating the operation of a refracting telescope. The location of the eyepiece and objective lens can be altered, and the focal point and path of light through the lenses can be observed.

A brief explanation of the visible color wheel.

This video segment adapted from FRONTLINE introduces the electromagnetic spectrum and explains how the various types of electromagnetic waves are distinguished by the amount of energy each wave carries.

The Nobel Foundation provides a biography of Bragg. This site focuses primarily on his activities and accomplishments as a scientist.