Transverse waves that transfer electrical and magnetic energy.
The energy transferred through space by electromagnetic waves.
Light that vibrates in only one direction.
The ejection of electrons from a substance when light is shined on it.
A tiny particle or packet of light energy.
The complete range of electromagnetic waves placed in order of increasing frequency.
Electromagnetic waves with the longest wavelengths and lowest frequencies.
Radio waves with the shortest wavelengths and highest frequencies.
A system that uses reflected radio waves to detect objects and measure their distance and speed.
Electromagnetic waves with wavelengths shorter than radio waves but longer than visible light.
An image that shows regions of different temperatures in different colors.
Electromagnetic waves that are visible to the human eye.
Electromagnetic waves with wavelengths shorter than visible light, but longer than X-rays.
Electromagnetic waves with wavelengths shorter than ultraviolet rays, but longer than gamma rays.
Electromagnetic waves with the shortest wavelengths and highest frequencies.
Word used to describe an object that can be seen because it reflects light.
Word used to describe an object that can be seen because it emits light.
An instrument used to view the different colors of light produced by different light sources.
Light bulb that glows when a filament inside it gets white hot.
Incandescent light bulb containing a tungsten filament and a halogen gas.
Light bulb that glows when an electric current causes ultraviolet rays to strike a coating inside a tube.
Light bulb containing neon or argon gas along with a small amount of solid sodium or mercury.
Glas tube containing neon gas that produces light.
A method of transmitting signals by changing the amplitude of a wave.
A method of transmitting signals by changing the frequency of a wave.
Please allow access to your computer’s microphone to use Voice Recording.
We can’t access your microphone!
Click the icon above to update your browser permissions above and try again
Reload the page to try again!
Press Cmd-0 to reset your zoom
Press Ctrl-0 to reset your zoom
It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.
Your microphone is muted
For help fixing this issue, see this FAQ.