The shot variety of this phenomenon results from slightly different arrival times of discrete inputs to a system.
In a CCD, correlated double sampling can be used to reduce the presence of this phenomenon. In capacitors, a type of this phenomenon with mean square voltage equal to Boltzmann's constant times temperature over capacitance is caused by thermal excitation of electrons and is known as its Johnson-Nyquist variety. The shot variety of this phenomenon results from slightly different arrival times of discrete inputs to a system. A lock-in amplifier can be used to maximize the ratio of signal to this phenomenon, which is called "white" when its power spectrum is constant. For 10 points, give this term for unwanted disturbances in signals due to random fluctuations.
In a CCD, correlated double sampling can be used to reduce the presence of this phenomenon.
noise [accept Johnson-Nyquist noise; or shot noise; or white noise]