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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


particles of light


high level or degree

electromagnetic spectrum

the entire frequency range of electromagnetic waves


the height of a wave's crest


(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


color-coded pictures that show variations in temperature


easily understood or seen through (because of a lack of subtlety)


allowing light to pass through


not letting light through; not clear or lucid; dense, stupid


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


optical illusion

polarized light

light that vibrates in only one direction


spreading widely or driving off


giving off light


emitting light as a result of being heated


light emitted during absorption of radiation of some other (invisible) wavelength


a solid material that can emit light by fluorescence


a device that produces intense beams of light

coherent light

light of only one wavelength that travels with its crests and troughs aligned

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