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PS-EM Spectrum(Ch17)

Electromagnetic Spectrum - Ch. 17 Prentice Hall Science Explorer - Physical Sci

TermDefinition
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 upon 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 measure their distance and speed
infrared waves 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 eyes
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 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: mwhite5