Which type of radiation exposure is characterized by symptoms that develop quickly after exposure?

Acute exposure is characterized by symptoms that develop rapidly following exposure to high levels of radiation over a short period. This type of exposure often leads to immediate effects on the body, which can be severe and may include symptoms like nausea, vomiting, and fatigue, among others. Acute radiation syndrome (ARS) can occur when the dose exceeds certain thresholds, resulting in various health impacts that manifest quickly.

In contrast, chronic exposure refers to low levels of radiation received over an extended duration, typically leading to long-term health effects that may not appear immediately. Long-term exposure is similar in that the health impacts accumulate over time, potentially resulting in issues like cancer, but again, symptoms do not develop rapidly. Continuous exposure suggests a consistent level of radiation that might lead to gradual health decline but, similar to chronic and long-term exposure, lacks the immediate onset of acute symptoms.