The Herman Grid Illusion and other optical illusions. |
Color mixing tool. Start with red, then add green. Then, look closely at your computer screen until the red and green reappear. You may need a magnifying glass. |
Tests for color blindness from Ask A Biologist. |
Color vision in animals. Here's a table listing the ability of different animals to see color from Ask A Biologist. |
Electromagnetic Spectrum
Charts: A Simple One and A Dense One |
The simple chart provides comparisons to practical things and common applications. You'll need to use the "expand" button on your Adobe Reader to look at the dense chart. |
Can
You See Heat? See here for a discussion. |
This is pretty good. Skip the music intro (unless you don't want to...) and start hitting "swap" when you get to the camera image. Some of the pictures are not surprising, but some are. The mouse controls a magnifying glass if you place it over an image. |
What is color? | And just for fun, here are some optical illusions. |
Animations | These are from a course at the University of Saskatchewan similar to ours. In fact, this class offers a complete set of course notes and tutorials. (My thanks to Professor Hirose.) |
Einstein | Part of NOVA's web site for science education. |
Einstein Online | Biographies, "Relativity for 6th Graders", ... |
Relatively Simple | A tutorial on relativity based around a series of thought experiments. |
Problems | This site treats some interesting problems including the classic "paradoxes" of special relativity. |
Light Cone | Somewhat more advanced treatment than we've done. Has animations and many good links. |
LINKS | An enormous link list. Sorts links by location, level of expertise, and sub-topic. Has a large beginner section. |
FAQs | Frequently asked questions about
special relativity. Includes the following issues raised in class: Can You See the Lorentz-Fitzgerald Contraction? The Barn and the Pole The Twin Paradox |
Seeing Special Relativity | Provides pictures and movies illustrating how things look if you are moving near the speed of light. (The author pretended the speed of light was not very large so you wouldn't have to go very fast to see the effects. Read here for details.) |
Tutorial | A tutorial, but on the advanced side. |