Shared Flashcard Set

Chapter 3
Key Concepts
31
Health Care
10/13/2014

Additional Health Care Flashcards

Term
 Photon (quantum)
Definition
 the smallest quantity of any type of electromagnetic radiation
Term
 sinusoidal
Definition
 the fashion of electric and magnetic fields that are continuously changing
Term
 what are the 4 properties used to describe photons
Definition
 velocity, amplitude, frequency, and wavelength
Term
 what is velocity
Definition
 the speed at which something is traveling, speed of light, 3x10 to the 8th m/s
Term
 what is amplitude
Definition
 1/2 the range from crest to valley or how tall the wave is in reference to it's baseline
Term
 what is wavelength
Definition
 the distance from any point on the sine wave to the next corresponding point (measured in meters)
Term
 what is frequency
Definition
 the number of wavelengths passing a given point per second (measured in hertz (cycles per second)
Term
 what is the relationship between wavelength and frequency
Definition
 inversely proportional, as one increases the other decreases
Term
 what is the electromagnetic wave equation
Definition
 c=f(lambda)
Term
 what is included in the electromagnetic spectrum
Definition
 radio waves to x-rays
Term
 what is the range of electromagnetic radiation
Definition
 10 to the 2nd Hz to 10 to the 24th Hz
Term
 what is the relationship between the energy of a photon and its frequency
Definition
 directly proportional, as one increases, the other increases by the same amount
Term
 visible light
Definition
 wavelength valued between 400nm to 700 nm (smallest segment of the spectrum)
Term
 diagnostic ultrasound
Definition
 not part of the electromagnetic spectrum
Term
 what is the difference between x-rays and gamma rays?
Definition
 thier origin: x-rays come from the electron cloud and gamma rays come from inside the nucleus of a radioactive atom
Term
 what is the dual nature of electromagnetic radiation
Definition
 it can behave as a wave(visible light) or a particle(x-rays)
Term
Definition
 the reduction in intesity resulting from scattering and absorption
Term
Definition
 a property of structures or objects that attenuate x-rays
Term
Definition
 a property of structures or objects that absorb x-rays
Term
 inverse square law
Definition
 radiation intensity is inversely related to the square of the distance from the source
Term
 the law of conservation of energy/matter
Definition
 energy or matter can be neither created nor destroyed, but can be changed from one form to another
Term
 if you move the decimal to the left:
Definition
 You add to the exponent
Term
 if you move the decimal to the right:
Definition
 you subtract from the exponent
Term
 what is the inverse square law formula
Definition
 I1(D1)squared=I2(D2)squared
Term
 mega
Definition
 10^6
Term
 kilo
Definition
 10^3
Term
 centi
Definition
 10^-2
Term
 milli
Definition
 10^-3
Term
 micro
Definition
 10^-6
Term
 nano
Definition
 10^-9
Term
 angstrom
Definition
 10^-10
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