University of Chicago
University of Chicago: Reflector and Refractor
From the Yerkes Observatory Virtual Tour web site. Compares and contrasts reflecting and refracting telescopes. A link from the page leads to a second page which explains why most modern research telescopes are reflecting telescopes.
![Prisms [Pdf] Activity](https://d15y2dacu3jp90.cloudfront.net/images/attachment_defaults/resource/large/FPO-knovation.png "Prisms [Pdf] Activity")
My Science Site
Prisms [Pdf]
Illuminate your classroom with this activity on prisms. Also includes additional experiments such as creating a water prism. This resource is in PDF form; requires Adobe Reader.
Texas Education Agency
Texas Gateway: Electromagnetic Spectrum
This tutorial explores using Planck's constant and the speed of light to calculate the wavelength, frequency, and energy of light.
PBS
Pbs Learning Media: Sunspots on the Move
The following videos show sunspots using wavelengths of light that the human eye cannot see. Watch sunspots emerging on the earth's surface, a sunspot moving across the earth's surface, and the rotation of the sun as a sunspot evolves...
Lawrence Berkeley National Laboratory
Berkeley Lab: University of California: Electromagnetic Radiation
This page defines electromagnetic radiation. Included are links to more information.
Florida State University
Florida State University: Molecular Expressions: Primary Subtractive Colors
Manipulate "pigmented" color discs to see how mixing subtractive colors affect the overall color.
NASA
Nasa: Mission: Science: Electromagnetic Spectrum: Infrared Waves
Infrared light lies between the visible and microwave portions of the electromagnetic spectrum. Infrared light has a range of wavelengths, just like visible light has wavelengths that range from red light to violet.
Texas Instruments
Texas Instruments: Phosphate Analysis
One method of measuring phosphate concentration is by using a Colorimeter. This instrument measures the amount of light transmitted through a sample at a given wavelength.The amount of light absorbed is mathematically related to the...
Florida State University
Florida State University: Molecular Expressions: Electromagnetic Radiation
This Florida State University page introduces light as an electromagnetic wave and discusses the frequency and wavelength range of the various regions of the electromagnetic spectrum. Includes links to some interactive Java applets.
NASA
Nasa: Sci Jinks: What Causes a Rainbow?
Find out whatever you wanted to know about rainbows and how they form. Check out the section on folklore regarding rainbows too.
Space Telescope Science Institute
Hubble Site: Behind the Pictures
At this site from HubbleSite, you can take a peek behind the scenes and discover the meaning of color in Hubble Images.