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B & W E-M Spectrum

QuestionAnswer
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 shone 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 the highest frequencies.
Radar A system that uses reflected radio waves to detect objects and measuretheir 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.
Tungsten-halogen bulb Incandescent light bulb containing a tungsten filament and a halogen gas.
Fluorescent light Light bulb that glows when an electric current causes ultraviolet rays to strike a coating inside a tube.
Vapor light Light bulb containing neon or argon gas along with a small amount of solid sodium or mercury.
Neon light Glass 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.
Created by: bwise on 2010-09-24



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