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  • electromagnetic waves  (short-wavelength and high frequency) wavelength is roughly the same size as the diameter of an atom.
  • Used in Hospitals: 1. to make images and CT scans 2. to destroy tumors at or near the body surface.
  • can damage living tissue when they pass through it
  • are absorbed more by bones and teeth (denser materials) than they are by soft tissue
  • brighter bits on an x-ray are where fewer x-rays get through - shows denser material (bones/teeth)
  • x-ray images can be formed electronically - CCDs (Charge-coupled devices) CCDs: small silicon chips, divided up into a grid of millions of identical pixels. Detect x-rays and produce electronic signals used to form…


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