This cartoon shows you a marching band, walking from an area of solid ground where the musicians can walk fast, into a region of muddy ground where they have to walk more slowly. Each row of musicians carries a long pole. Watch what happens when the f . . .

Here you can see what is called a principal ray diagram. We have constructed the image of the candle from the three principal rays, as we explained before. This interactive animation allows you now to move the object relative to the lens, and to obser . . .

This information literacy tutorial helps students to understand the difference between scholarly vs. popular resources, what scholarly books and articles are, and how to effectively evaluate sources. To play this file, download the ZIP archive, decomp . . .

This tutorial will help you to identify the relationship between your thesis and your sources and will help you practice selecting quality evidence that supports your argument. To play this file, download the ZIP archive, decompress it, and click on t . . .

We know that not only a plane mirror produces an image of an object in front of it – a convex spherical mirror does, too! Just look at the back of a metal spoon if you don't believe it! This interactive animation shows you how such an image arises, an . . .

Let's now construct the principal ray diagram for a concave, i.e., a diverging lens. The idea is the same as for the convex lens: we will consider how the three particular rays for which we know what happens are refracted by the concave lens: The ray . . .

This is a collection of three animations detailing the concept of the magnifying glass.

The eye is basically a hollow globe with a radius of a little less than an inch that is covered with a tough white coating, the sclera. Light rays entering the eye first go through the cornea, a transparent tissue, and the anterior chamber which is fi . . .

This animation is very similar to the previous one. It allows you to explore Snell's law again, only now you can shine the laser beam from any direction you like. You are free to select the media for the upper and lower part of space from the drop-dow . . .

Allies for Education Vol. 2 Issue 1 https://journals.library.csuci.edu/ojs/index.php/afe