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electromagnetic spectrum waves are measured in nanometers or angstroms. starting
with radar, measured in meters
wavelength can be defined as the distance between the crest of one wave& the crest of
another. (it determines the energy and penetrating power of radiation)
Frequency Hertz- number of wavelengths that pass a certain point in a certain amount of
time
velocity speed of wave
Energy is measured in volts
dentistry uses kilovolts kV
photon single unit or bundle of energy with no mass
x-rays weightless bundles of energy (photons) without an electrical charge that travel in
waves with a specific frequency at the speed of light
properties of x-rays penetrate matter, produce a latent image, prodice fluorenscence in
certain materials, produces ionization of matter, pure energy without mass of charge, are a
portiion of the electromagnetic spectrum, can adversely affect biological tissue.
cathode negative electrode, consist of a tungsten wire filament in a cup-shaped holder
made of molybdenum, supplies the electrons necessary to generate x-rays