Power Point

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Power Point
2012-09-19 01:03:33

questions pertaining to the the power point
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  1. In radiography we use two basic units
    Milliamps and kilovolts
  2. In radiography what does 1 rad equal
    1R=1 rem=1rad
  3. What type of charge does an electon have
  4. What type of charge does a proton have
  5. What type of charge does a neutrons have
    No charge, or neutral
  6. What holds the mass of an atom
    The nucleus
  7. What makes up a neutral atom
    Having the same number of electons, protons and neutons.
  8. Isotopes have:
    Different number of neutrons and Protons
  9. Atomic numbers tell you?
    How many protons and electons
  10. where can the atomic number be found on the periodic table?
    It is the top number
  11. The weight of an atom can be found where on the periodic table
    It is the bottom number
  12. when moving K-Q through shells what tends to happen
    There is less energy
  13. Electrons exist only in
    Certain shells,
  14. The further you get away from the nucleus, the more or less energy the electron has
  15. The more complex an atom is, the higher or lower the electron binding energy is for the electron
  16. How is Ionization produced
    Through adding or removing the orbital electron
  17. What two types of ionizing radiation are considered particulate radiation
    Alpha and beta
  18. What two types of ionizing radiation are electonmagnetic (EM) Radiation?
    Xray and Gamma Ray
  19. Xray and Gamma Rays are called
  20. Em radiation travels at the speed of
    Light or not at all
  21. What is a small bundle of energy called
    A quantum
  22. What holds the properties of:
    Highly penetrating invisible rays
    Electically neutal
    Liberate minute amounts of heat  passing through matter
    Causes a chemical and biological change
    A photon
  23. What is the velocity of an electromagnetic photon?
    The speed of light
  24. What is known as phonton that are continuously in motion
    Sine Wave
  25. What is amplitude
    it is the 1/2 the range from crest to valley over which the sine wave varies
  26. What is Frequency
    The rise and fal of the sine wave
  27. What is wavelength
    it is the distance fro one crest to another, or one valley to another
  28. When the frequency is increased, what happens to the wavelength
    It decreases
  29. Photon energy is deirectly proportional to
    the photon frequency
  30. When the photon has high frequency, it equals higher energy. What does this mean for the x-ray
    It is considered a Hard X-ray and is more penetratings
  31. Longer wavelength equals a lower energy, what does this mean for the x-ray
    Soft X-ray, less penetrating. It will not reach the film
  32. When electromagnetic radiation is emitted for a source, the intensity
    Decreases rapidly with the distance from the source
  33. What is the Inverse square Law
    • intensity 1 = distance 22
    • intensity2     distance1 2
  34. A worker receives an exposure of 90 mR per week at a distance of 100 cm. from a radiation source. What will the new weekly exposure be if a worker were able to move to a 300 cm distance?
    • Seperate your distance and your MR, and cross place. So your 90 Mr @ a distance of 100 cm would be crossed from one and other while the xmr and 300 would be crossed.
    • 90 mr = 300
    • x          100

    • Now remember everytime you are looking for distance, distance is always squared so now the problem looks like:
    • 90 mr=90000
    • x       =10000

    Now cross multiple. So you would multiple your 90mr X 10,000 and the x X 90000.

    Resulting in 90000x =900000

    Now in order to get the factor of the X, you need to divide out the number attached to the x, so you would divide 900000 by 90000.

    Your answer than becomes x=10
  35. What determines the attenuation
    The intensity of the photon and the material it passes through
  36. When matter absorbs the x-ray, what color does it show up on the film
  37. When Matter is partically absorbed, what is it called
    Attenuate or Radiolucent