Ultraviolet (UV) light has shorter wavelengths than visible light. Though these waves are invisible to the human eye, some insects can see them. The specific wavelength values are given. Uses and applications of these waves are explained.

Learn all about stars and the electromagnetic spectrum in this series of activities.

This site details what radiation is, the physics of radiation, and radiative transfer as it occurs in nature. Content explores the electromagnetic spectrum, electromagnetic waves, properties of radiation, and solar radiation.

Use this tool to learn facts about the range of the electromagnetic spectrum, from radio waves to gamma rays.

[Free Registration/Login may be required to access all resource tools.] Students investigate the fundamentals of light including its source, how it is defined for measurements, how we perceive color, and the situations that make an...

This video segment adapted from First Light explains why the highest peak in the Pacific, Mauna Kea, is an ideal site for astronomical observations. Featured are new telescope technologies that allow astronomers to explore the universe...

This site provides background information, images, and an activity to help students understand the concept of radiation. Includes both the student pages and a teachers guide with lesson plan.

See images and read about examples of infrared rays, and learn how they behave in different conditions.

Practice questions over infrared and ultraviolet/visible spectroscopy questions.

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