Scientists used flame tests to identify elements long before the invention of emission spectroscopy. Young chemists observe a flame test of five metal cations in the fourth lesson of an 11-part series. Individuals then work...

Blow the minds of young scientists with this collection of inquiry-based investigations. Based on a series of eight videos, these "hands-on, minds-on" science lessons engage young learners in exploring a wide range of topics...

Why do we see certain colors? This interactive animation demonstrates the concept of the visible spectrum, and how we see the different colors of the rainbow.

This site discusses primary lighting sources and gives information on the different properties and spectral characteristics of each. Also includes links to some interactive Java applets.

Try making words on the screen disappear by changing the background color of this page. Add or subtract red, green, or blue, and see how light is made up of many different colors.

A tutorial on the electromagnetic and visible spectra. Discusses dispersion and how perceptions of white and black are related to the visible light spectrum.

[Free Registration/Login Required] Explore how light is refracted when visible light enters, passes through, and exits the prism by moving the red dot to adjust the angle of white light shining on the prism.

Lucianne Walkowicz shows us the waves just beyond our perception: microwaves, radio waves, x-rays and more. [5:58]

[Free Registration/Login may be required to access all resource tools.] Students learn what an electromagnetic wave is, gain a feel for the main parts of the spectrum, and work on problems involving basic properties of electromagnetic...