MED RAD FINAL EXAM Flashcards
Radiation is transmitted through
waves and particles
List radiation types
electromagnetic, acoustic, particulate, gravitational
List wave features
amplitude, frequency, wavelength, period
Explain amplitude
max strength of wave
Increase amplitude =
increase intensity
Explain frequency
number cycles per second (Hz) - number of times going up / down
Increase frequency =
increase intensity
Explain wavelength
distance between 2 same wave points
Shorter wavelength =
increase intensity, higher energy
Explain period
how long each wave cycle takes
Charges have an ________ field around them
electric
Moving charges create a _________ field
magnetic
Disturbance in a charge creates ____________ waves
electromagnetic
Explain “electric and magnetic fields are perpendicular to the direction of energy”
electric and magnetic fields travel horizontally and vertically down the wave at at 90 degree angle
Photons are the quantum form of ___________
EMR (electromagnetic radiation)
What properties do low E EMR have?
wave like properties
What properties do high E EMR have?
particle like properties
Explain purple / blue end of the EMR spectrum
High E, High frequency, shorter wavelength
Explain red end of the EMR spectrum
low E, low frequency, longer wavelength
EMR travels at?
speed of light in a vacuum
waves and C (speed of light) formula
C = f x wavelength
Energy formula
E = h x f
Most of the x-ray beam is high or low E photons?
low E photons
Two processes that create xrays
characteristic and brems radiation