The nuclei of the atoms in some elements are unstable and emit radiation. The radiation can be of three types - alpha radiation, beta radiation and gamma radiation.

All types of radiation become less intense as they travel further away from the radioactive material. This is because the particles or rays become more spread out. The thicker the substance ...

According to the American Dental Association and the American Academy of Oral and Maxillofacial Radiology, dental X-rays are ...

Dental X-rays are more than just a routine part of your dental visit-they''re an essential tool for maintaining your oral ...