PUBLIC HEALTH ENGLAND / SCIENCE PHOTO LIBRARY PUBLIC HEALTH ENGLAND / SCIENCE PHOTO LIBRARY
Personal radiation monitor on a man's finger. This is an extremity TLD (thermoluminescent dosimeter). It is worn by people who are exposed to radiation regularly during their work. A piece of plastic within the dosimeter becomes pitted when hit by radiation. The number of pits is proportional to the amount of radiation allowing a person's daily exposure to be calculated.
Model release not required. Property release not required.