Detector

(noun.) any device that receives a signal or stimulus (as heat or pressure or light or motion etc.) and responds to it in a distinctive manner.

(noun.) electronic equipment that detects the presence of radio signals or radioactivity.

(noun.) rectifier that extracts modulation from a radio carrier wave.

安吉洛手打

• A loop of wire, with the ends almost touching each other, had been his receiver, or detector. 鲁伯特·萨金特·荷兰. 历史性发明.
• Professor Oliver Lodge named this device of Branly’s a coherer, and when he found that it was more sensitive than the Hertz detector he combined it with the Hertz oscillator. 鲁伯特·萨金特·荷兰. 历史性发明.

校对:莫蒂默