Photon

What is the Half-Value Layer (HVL)?

• The thickness of material to reduce intensity by half

• The distance radiation travels in air

• The maximum energy of radiation

• The minimum energy required for ionization

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What is Thompson scattering?

• Elastic scattering of low-energy photons

• Inelastic scattering of high-energy photons

• Absorption of photons by electrons

• Emission of radiation from nuclei

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What occurs during photodisintegration?

• A photon produces characteristic radiation

• A photon is absorbed by an electron

• A photon interacts with a nucleus, ejecting a particle

• A photon is scattered elastically

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What type of radiation is primarily responsible for the photoelectric effect?

• Neutrons

• X-rays

• Alpha particles

• Beta particles

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Gamma rays _________.

• have no mass and no charge

• have mass but no charge

• have no mass but have charge

• have both mass and charge

What particle do atoms release after the electrons relax back down to a lower energy state?

• photon

• wave

• quantum

• proton

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When do atoms release photons of light?

• when the electrons are promoted to a higher energy state

• when the electrons fall back down to a lower energy state

• the electrons don't move and a photon is released `

• Atoms release photons spontaneously

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What is the speed of light?

• 3.0 x 10^8 m/s

• 450,000 m/s

• speed of light changes

• 3.0 x 10^4 m/s

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What is a photon?

• A quantum of light

• A type of electron

• A neutron

• A proton

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Which of the following best describes the energy of a photon?

• Directly proportional to its frequency

• Inversely proportional to its frequency

• Independent of its frequency

• Equal to its wavelength

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