Nota Terkini

Thursday, August 27, 2009

[Science Form 4] X-rays

X-RAYS are form of electromagnetic radiation, just like visible light but its short wavelength makes it invisible.

The x-ray particle is a photon that cannot penetrate bone mass. Thus, bone structures appear white on an x-ray film.

A plain radiograph of the elbow.

In hospitals, x-ray machines are used to detect broken bones or deformities in bone structures. Dentist use x-ray radiation to see cavities in teeth.

Six radioactive subtances:
  1. Radium
  2. Uranium
  3. Carbon-14
  4. Polonium
  5. Cobalt-60
  6. Iodine-131

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