Worksheet: X-Rays in Medicine

In this worksheet, we will practice describing the properties of x-rays and how they are used in medicine.

Q1:

Do the X-rays used in X-ray therapy have more energy, less energy, or the same energy as those used in X-ray imaging?

  • ALess energy
  • BMore energy
  • CThe same energy

Q2:

Which type of electromagnetic radiation has a shorter wavelength: gamma rays or X-rays?

  • AGamma rays
  • BX-rays

Q3:

Do the X-rays used in X-ray therapy have a higher frequency, a lower frequency, or the same frequency as those used in X-ray imaging?

  • AThe same frequency
  • BA higher frequency
  • CA lower frequency

Q4:

Which of the following statements explains why X-ray therapy uses X-rays with a higher frequency than those used in X-ray imaging?

  • AHigher-frequency X-rays are more ionizing than lower-frequency X-rays. Therefore, higher-frequency X-rays are more likely to kill cancerous cells.
  • BIt is easier to produce collimated beams of higher-frequency X-rays than of lower-frequency X-rays. This makes higher-frequency X-rays more suitable for X-ray therapy, as they can be targeted toward a specific part of the body.
  • CIt is less expensive to produce higher-frequency X-rays. Because X-ray therapy involves prolonged exposure to X-rays, using higher-frequency X-rays makes X-ray therapy much cheaper.
  • DHigher-frequency X-rays are less ionizing than lower-frequency X-rays. Therefore, prolonged exposure to X-rays as part of X-ray therapy is less dangerous.

Q5:

Which of the following is a unit of absorbed radiation dose?

  • ACurie (Ci)
  • BBecquerel (Bq)
  • CGray (Gy)
  • DHertz (Hz)
  • ERutherford (Rd)

Q6:

Which type of electromagnetic radiation has a shorter wavelength: ultraviolet light or X-rays?

  • AUltraviolet light
  • BX-rays

Q7:

Which of the following is a unit of effective radiation dose?

  • ARutherford (Rd)
  • BBecquerel (Bq)
  • CJoule (J)
  • DCurie (Ci)
  • ESievert (Sv)

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