Unit 4: Ionizing and Non-Ionizing Radiation in Medical Physics
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Questions and Answers

What type of waves can travel through empty space?

  • EM waves (correct)
  • Sound waves
  • Water waves
  • Light waves
  • How are wavelengths typically measured in electromagnetic waves?

  • Between two adjacent crests or troughs (correct)
  • Between the wavefronts
  • From the source to any point
  • Between the peak and the trough
  • In the particle model of EM radiation, what are the discrete packets of energy called?

  • Neutrons
  • Protons
  • Photons (correct)
  • Quantum leaps
  • What happens to the speed of an EM wave when it crosses boundaries between different media?

    <p>Speed remains constant but frequency changes</p> Signup and view all the answers

    What property varies inversely with wavelength in the EM spectrum?

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

    What is the behavior of electromagnetic (EM) radiation depending on?

    <p>Wavelength and energy per quantum</p> Signup and view all the answers

    In EM radiation, what generates an oscillating magnetic field?

    <p>Electric field</p> Signup and view all the answers

    Which physicist revealed the wave-like nature of electric and magnetic fields?

    <p>James Clerk Maxwell</p> Signup and view all the answers

    What does electromagnetic radiation consist of?

    <p>Oscillating electric and magnetic disturbances</p> Signup and view all the answers

    What is the speed of electromagnetic (EM) waves coinciding with according to Maxwell's findings?

    <p>Light speed</p> Signup and view all the answers

    What property does electromagnetic (EM) radiation carry, which may be imparted when interacting with matter?

    <p>Energy and momentum</p> Signup and view all the answers

    What is the formula for calculating energy per photon according to Planck's equation?

    <p>E = hf</p> Signup and view all the answers

    Which of the following is a characteristic of particle radiation?

    <p>Resulting from sub-atomic particles moving at high speeds</p> Signup and view all the answers

    Which type of radiation can be emitted by an unstable atomic nucleus?

    <p>Positively charged alpha particles</p> Signup and view all the answers

    What is the wave-like nature of electric and magnetic fields in electromagnetic radiation called?

    <p>Dual nature</p> Signup and view all the answers

    Which type of radiation interacts with matter very weakly?

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

    If the frequency of Electromagnetic Radiation is 4 x 10^14 Hz and Planck’s constant is 6.62606876 x 10^-34, what is the energy per photon?

    <p>$1.46 x 10^{-20}$ J</p> Signup and view all the answers

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