What is the primary difference between a survey meter and a dosimeter?

The primary distinction lies in the respective functions of the survey meter and the dosimeter. A survey meter is designed to measure the intensity of radiation in a particular area at a given moment. It provides real-time readings of radiation levels and is often used for surveying environments to assess safety and contamination levels.

In contrast, a dosimeter is specifically designed to measure an individual's cumulative radiation exposure over a period of time, tracking how much radiation a person has been subjected to, which is crucial for ensuring that exposure remains within safe limits. Dosimeters are typically worn by personnel in radiation-prone environments to monitor personal safety and regulatory compliance.

This fundamental difference emphasizes the roles of each device: the survey meter is a tool for immediate environmental assessments, while the dosimeter ensures long-term monitoring of personal exposure. The remaining options do not accurately represent these core functions, as they introduce mischaracterizations about the purposes and applications of each device.