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27 terms

Electromagnetic Spectrum and Light

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electromagnetic waves
a form of energy that can travel through space
electric field
a field of force surrounding a charged particle
magnetic field
the region around a magnet where the magnetic force is exerted
electromagnetic radiation
a form of energy that exhibits wavelike behavior as it travels through space
photoelectric effect
The emission of electrons from a metal when light shines on the metal
photons
particles of light
intensity
high level or degree
electromagnetic spectrum
the entire frequency range of electromagnetic waves
amplitude
the height of a wave's crest
modulation
(electronics) the transmission of a signal by using it to vary a carrier wave
frequency modulation
modulation of the frequency of the (radio) carrier wave
thermograms
color-coded pictures that show variations in temperature
transparent
easily understood or seen through (because of a lack of subtlety)
translucent
allowing light to pass through
opaque
not letting light through; not clear or lucid; dense, stupid
image
someone who closely resembles a famous person (especially an actor)
regular reflection
This occurs when light bounces off an object at the same angle it hit the object; the resulting image would be clear
diffuse reflection
The reflection of waves in many directions from a rough surface
mirage
optical illusion
polarized light
light that vibrates in only one direction
scattering
spreading widely or driving off
luminous
giving off light
incandescent
emitting light as a result of being heated
fluorescence
light emitted during absorption of radiation of some other (invisible) wavelength
phosphor
a solid material that can emit light by fluorescence
laser
a device that produces intense beams of light
coherent light
light of only one wavelength that travels with its crests and troughs aligned