RADG 222 Lecture 2: Radiation and Radioactivity
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RADG 222 Lecture 2: Radiation and Radioactivity

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Questions and Answers

What term describes the process by which a neutral atom acquires a positive or negative charge?

  • Ionization (correct)
  • Excitation
  • Neutralization
  • Polarization

    • In the context of EM radiation, what is the significance of Planck's constant?

  • Determines the discrete energy packets of radiation (correct)
  • Regulates the wavelength of photons
  • Affects the direction of the magnetic field
  • Controls the speed of EM waves

    • Which form of radiation consists of fast-moving particles like electrons, protons, neutrons, and alpha particles?

  • Gamma radiation
  • Beta radiation
  • Electromagnetic radiation
  • Particulate radiation (correct)

    • Which type of radiation is used for imaging the distribution of radiopharmaceuticals in Nuclear Medicine?

    <p>Gamma rays</p> Signup and view all the answers

    What is the maximum speed at which electromagnetic radiation propagates in a vacuum?

    <p>$2.998 \times 10^8$ m/s</p> Signup and view all the answers

    What unit is commonly used to express the energy of photons?

    <p>Electron volts (eV)</p> Signup and view all the answers

    What characteristic of waves refers to the intensity of the wave?

    <p>Amplitude</p> Signup and view all the answers

    Which region of the EM spectrum carries sufficient energy per photon to remove bound electrons from atomic shells?

    <p>UV rays</p> Signup and view all the answers

    In which media does electromagnetic radiation require a medium for propagation?

    <p>Vacuum only</p> Signup and view all the answers

    What are particles emitted by some radioactive atoms that can be referred to as beta particles?

    <p>Electrons</p> Signup and view all the answers

    What are the two ways in which the trajectory of electromagnetic radiation can be altered when interacting with matter?

    <p>Absorption and scattering</p> Signup and view all the answers

    How are frequency and wavelength related in electromagnetic radiation?

    <p>They are inversely proportional</p> Signup and view all the answers

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