Amplitude

This interactive activity adapted from the University of Utah's ASPIRE Lab shows how a pendulum's amplitude changes as you set it swinging from different distances from its axis, and how the amplitude of a sound wave changes as you adjust the volume.

Astronomical Images in Different Wavelengths

Visible light is just one portion of the electromagnetic spectrum that a telescope may detect. This collection of images produced for Teachers' Domain features radio wave, infrared, visible light, and X-ray images of distant stars and galaxies as well as images of the telescopes designed to detect the various wavelengths of radiation.

The Electromagnetic Spectrum: FRONTLINE

This video segment adapted from FRONTLINE introduces the electromagnetic spectrum and explains how the various types of electromagnetic waves are distinguished by the amount of energy each wave carries.

Accessibility features: Caption

The Electromagnetic Spectrum: NASA

From radio waves to gamma rays, this video segment from NASA introduces the seven categories of the electromagnetic spectrum and how each type of radiation is part of our everyday lives.

Accessibility features: Caption

Frequency

In this interactive activity adapted from the University of Utah's ASPIRE Lab, investigate frequency in terms of trampoline jumps, pendulum swings, and electromagnetic waves.

GPS: Where in the World Are You?

This interactive activity produced for Teachers' Domain illustrates the concepts and technologies that enable the Global Positioning System (GPS) to identify a person's location within a range of a few meters.

Inverse Square Law

This animation from KET's distance learning physics course demonstrates the mathematical formula for a scientific law as it applies to light.

Light Wave Behaviors

Discover the ways light interacts with objects in this interactive activity adapted from NASA.

Radio Waves & Electromagnetic Fields

In this interactive simulation adapted from the University of Colorado's Physics Education Technology project, explore how a radio transmitter broadcasts electromagnetic radiation.

Sound

This interactive simulation, adapted from the University of Colorado's Physics Education Technology project, illustrates sound waves. Adjust the frequency and amplitude to see and hear how the waves change.

Spectrometry Explained

Find out how light can be used to identify chemical compounds in this interactive activity adapted from NASA.

Tour of the Electromagnetic Spectrum: Radio Waves

This video from NASA provides an overview of the radio band of electromagnetic spectrum and offers a brief history of the discovery and early applications of radio waves.

Viewing Radio Waves

Discover how astronomers create images from radio waves, in this interactive activity adapted from NASA.