Final answer:
To reduce the risk of harmful electromagnetic radiation, exposure time should be kept as short as possible. This is part of standard radiation protection measures, along with maintaining a safe distance and using proper shielding.
Step-by-step explanation:
To reduce the risk of the harmful effects of electromagnetic radiation, exposure time is kept as short as possible. This principle is one of the key components of radiation protection measures, which include minimizing the time spent in a radiation environment, maintaining a safe distance from the source, and using proper shielding. Despite the medical applications of certain types of radiation, such as X-rays for diagnostic purposes, the energy carried by these electromagnetic waves can cause cell damage, thus it is crucial to limit exposure.