Detector characteristics refer to the specific features and performance metrics of devices used to identify and measure various signals or particles. These characteristics include sensitivity, which indicates how well a detector can respond to low levels of input, and resolution, which describes the ability to distinguish between different signals or events. Other important factors include response time, which is how quickly a detector can react to a signal, and dynamic range, which measures the range of signal intensities a detector can accurately process. Different types of detectors, such as photodetectors, radiation detectors, and gas detectors, exhibit unique characteristics tailored to their applications. For instance, photodetectors are designed to detect light and often have high sensitivity and fast response times, while radiation detectors may prioritize dynamic range to measure varying levels of radiation. Understanding these characteristics is crucial for selecting the appropriate detector for specific tasks in fields like medical imaging, environmental monitoring, and scientific research.