Nyquist frequency

The Nyquist frequency is the highest frequency that can be accurately captured when sampling a continuous signal, like sound or light. It’s directly related to how often you measure or "tick" the signal per second. Specifically, it’s half of the sampling rate. For example, if you measure a signal 1000 times per second, the Nyquist frequency is 500 Hz. Sampling above this limit causes "aliasing," where higher frequencies can appear as lower, distorted signals. Understanding the Nyquist frequency helps ensure accurate digital representation of real-world signals without distortion.