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

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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?

Speed remains constant but frequency changes Signup and view all the answers

What property varies inversely with wavelength in the EM spectrum?

Frequency Signup and view all the answers

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

Wavelength and energy per quantum Signup and view all the answers

In EM radiation, what generates an oscillating magnetic field?

Electric field Signup and view all the answers

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

James Clerk Maxwell Signup and view all the answers

What does electromagnetic radiation consist of?

Oscillating electric and magnetic disturbances Signup and view all the answers

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

Light speed Signup and view all the answers

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

Energy and momentum Signup and view all the answers

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

E = hf Signup and view all the answers

Which of the following is a characteristic of particle radiation?

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

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

Positively charged alpha particles Signup and view all the answers

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

Dual nature Signup and view all the answers

Which type of radiation interacts with matter very weakly?

Neutrinos 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?

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