Random telegraph signal

Imagine you are in a dark room with a light bulb and a switch that turns it on and off. Sometimes, the switch stays in one position for a long time, and other times it randomly switches between positions quickly and unpredictably. A random telegraph signal is like this, but with an electrical circuit instead of a light bulb and switch. The circuit can randomly switch between two states, on and off, like a telegraph signal sending dots and dashes. Scientists can study these signals to learn more about how electrons move through circuits and how they behave in different situations.