[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