Beam Characteristic Flashcards
Angstrom is unit of ______ equal to ____ one tenbillionth of a meter. is a measure for ______
length, 10^-10, wavelength
what is the wave length of diagnostic x rays?
0.1-0.5 Angstrom
What is frequency?
number of complete oscillation per second of electromagnetic wave
what is photon?
it is the smallest quantity of any type of electromagnetic radiation.
What is wavelength?
it is a distance between ANY two successive similar points on a wave. Length of one cycle.
What does Attenuate mean?
it means to lessen the amount of force, magnitude, or value. A reduction in radiation intensity after coming into contact, gets absorbed, and scattered.
Density is also known is optical density, it is a degree of….
blackening of a radiograph that resulted from radiation exposure and processing
how do you describe each area in relation to density on the radiograph?
Clear area of radiograph is low density, black area is high density
Density is one of two photographic properties that comprise ______ of _____. the other is _____
visibility, detail, contrast
X ray beams consists of 6 group of rays, what are they?
White light, ultraviolet, infared, microwaves, radiowaves, other radiant energy
the energy of x ray photons ranges from…
1keV to 50 MeV and higher, associated wavelength is approxmiately 10^-9 to 10^-12m, frequency of phtons varies from approximately 10^18 to 10^21
what are some x ray properties?
Travels only at the speed of light 3 x 10^8 mps, causes fluorescence of certain crystals
what are the three regions of importance to radiography?
Visible light, radiofrequency, x radiation
how is the velocity equation displayed?
velocity = freq x wavelength or c=fxwavelength
what is the speed of light?
3*10^8
