What are the two types of radiation?

The correct answer highlights the distinction between initial and residual radiation, which are crucial in understanding radiation exposure, especially in military and emergency response contexts.

Initial radiation refers to the radiation released immediately following a nuclear detonation, which includes both prompt neutrons and gamma radiation. This type of radiation has a significant impact in the first moments after an explosion and is critical in assessing immediate threats to personnel and infrastructure.

Residual radiation, on the other hand, refers to the radiation that remains in the environment after the initial event has concluded. This includes radioactive fallout and often poses a longer-term hazard than initial radiation, as it can persist in the environment and affect human health and safety over an extended period.

Understanding the difference between these two types enables professionals to make informed decisions regarding safety protocols, necessary evacuations, and decontamination processes in the aftermath of nuclear incidents.