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Questions and Answers
What is the minimum energy required for a photon to participate in pair production?
What is the minimum energy required for a photon to participate in pair production?
- 0.511 MeV
- 10 MeV
- 1.022 MeV (correct)
- 5 MeV
What is the result of the conservation of momentum when a photon passes near the nucleus of an atom?
What is the result of the conservation of momentum when a photon passes near the nucleus of an atom?
- Creation of a positively charged electron (correct)
- Creation of a proton
- Creation of a negatively charged electron
- Creation of a neutron
What is Δλ equal to?
What is Δλ equal to?
- The ratio of the wavelengths of photon before and after scattering
- The product of the wavelengths of photon before and after scattering
- The sum of the wavelengths of photon before and after scattering
- The difference in the wavelength of photon before and after scattering (correct)
What is the purpose of performing X-rays in the diagnosis of the oral cavity and jaw?
What is the purpose of performing X-rays in the diagnosis of the oral cavity and jaw?
At what energy does pair production dominate over photoelectric absorption and Compton scattering?
At what energy does pair production dominate over photoelectric absorption and Compton scattering?
What is the rest mass energy of an electron?
What is the rest mass energy of an electron?
What is one of the uses of X-rays in medicine?
What is one of the uses of X-rays in medicine?
What is the primary purpose of X-rays in crystallography?
What is the primary purpose of X-rays in crystallography?
What was the year of the first reported human injury due to X-rays?
What was the year of the first reported human injury due to X-rays?
What is the annual radiation dose limit for workers set by the ICRP?
What is the annual radiation dose limit for workers set by the ICRP?
What is the purpose of the ICRP's annual radiation dose limits?
What is the purpose of the ICRP's annual radiation dose limits?
What is the year of the U.S. nuclear testing that increased knowledge of radiation's biological effects?
What is the year of the U.S. nuclear testing that increased knowledge of radiation's biological effects?
What is the primary cause of the biological effects of ionizing radiation?
What is the primary cause of the biological effects of ionizing radiation?
What is the minimum radiation dose required to cause acute effects?
What is the minimum radiation dose required to cause acute effects?
What is the genetic material that ionizing radiation can damage?
What is the genetic material that ionizing radiation can damage?
What is the purpose of radiotherapy treatment planning?
What is the purpose of radiotherapy treatment planning?
Why is radiation therapy necessary after surgery?
Why is radiation therapy necessary after surgery?
What is the result of cell mutations caused by ionizing radiation?
What is the result of cell mutations caused by ionizing radiation?
What is the wavelength range of ultraviolet rays?
What is the wavelength range of ultraviolet rays?
What is the primary source of ultraviolet radiation on Earth?
What is the primary source of ultraviolet radiation on Earth?
Why do welders wear special glass goggles or face masks?
Why do welders wear special glass goggles or face masks?
What is the effect of exposure to UV radiation on human skin?
What is the effect of exposure to UV radiation on human skin?
What is the purpose of UV lamps in water purifiers?
What is the purpose of UV lamps in water purifiers?
Why can't you get tanned or sunburn through glass windows?
Why can't you get tanned or sunburn through glass windows?
What is the effect of darkening and thickening of the skin on future exposures?
What is the effect of darkening and thickening of the skin on future exposures?
What is the duration of the latent period for an inflammation of the cornea?
What is the duration of the latent period for an inflammation of the cornea?
What is thepeak of the action spectrum for an inflammation of the cornea?
What is thepeak of the action spectrum for an inflammation of the cornea?
What is the duration of symptoms for an inflammation of the cornea?
What is the duration of symptoms for an inflammation of the cornea?
What is the recovery time for an inflammation of the cornea?
What is the recovery time for an inflammation of the cornea?
What is the sensation experienced in the eyes during an inflammation of the cornea?
What is the sensation experienced in the eyes during an inflammation of the cornea?
Electromagnetic Radiation Lasers emit only visible radiation.
Electromagnetic Radiation Lasers emit only visible radiation.
Low-pressure mercury vapor sources emit only UV wavelengths.
Low-pressure mercury vapor sources emit only UV wavelengths.
UVA radiation is more photobiologically active than UVB and UVC radiation.
UVA radiation is more photobiologically active than UVB and UVC radiation.
The maximum sensitivity of the human eye occurs at approximately 400 nm.
The maximum sensitivity of the human eye occurs at approximately 400 nm.
The adverse effects of UV radiation are a result of thermal damage.
The adverse effects of UV radiation are a result of thermal damage.
Erythema is a response to excessive exposure by UVA radiation.
Erythema is a response to excessive exposure by UVA radiation.
The latent period for erythema is typically 1-2 hours.
The latent period for erythema is typically 1-2 hours.
The dose required to produce erythema does not vary with skin pigmentation.
The dose required to produce erythema does not vary with skin pigmentation.
Electromagnetic Radiation is only emitted in a narrow band.
Electromagnetic Radiation is only emitted in a narrow band.
The emitted spectrum is not an important factor in evaluating the radiation.
The emitted spectrum is not an important factor in evaluating the radiation.
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