How can we help?

You can also find more resources in our Help Center.

23 terms

The Electromagnetic Spectrum - Ch 3

STUDY
PLAY
electromagnetic wave
Transverse waves that transfer electrical and magnetic energy.
electromagnetic radiation
The energy transferred through space by electromagnetic waves.
polarized light
Light that vibrates in only one direction.
photoelectric effect
The ejection of electrons from a substance when light is shined on it.
photon
A tiny particle or packet of light energy.
electromagnetic spectrum
The complete range of electromagnetic waves placed in order of increasing frequency.
radio waves
Electromagnetic waves with the longest wavelengths and lowest frequencies.
microwaves
Radio waves with the shortest wavelengths and highest frequencies.
radar
A system that uses reflected radio waves to detect objects and measure their distance and speed.
infrared rays
Electromagnetic waves with wavelengths shorter than radio waves but longer than visible light.
thermogram
An image that shows regions of different temperatures in different colors.
visible light
Electromagnetic waves that are visible to the human eye.
ultraviolet rays
Electromagnetic waves with wavelengths shorter than visible light, but longer than X-rays.
x-rays
Electromagnetic waves with wavelengths shorter than ultraviolet rays, but longer than gamma rays.
gamma rays
Electromagnetic waves with the shortest wavelengths and highest frequencies.
illuminated
Word used to describe an object that can be seen because it reflects light.
luminous
Word used to describe an object that can be seen because it emits light.
spectroscope
An instrument used to view the different colors of light produced by different light sources.
incandescent light
Light bulb that glows when a filament inside it gets white hot.
fluorescent light
Light bulb that glows when an electric current causes ultraviolet rays to strike a coating inside a tube.
neon light
Glas tube containing neon gas that produces light.
amplitude modulation
A method of transmitting signals by changing the amplitude of a wave.
frequency modulation
A method of transmitting signals by changing the frequency of a wave.