Unit zHz
Name zeptohertz
Category Frequency
Details Zeptohertz (zHz) is a unit of frequency in the International System of Units (SI). It represents very low frequencies and is equal to 10^-21 hertz (0.000000000000000000001 Hz). In this context, one zeptohertz corresponds to one oscillation or cycle of a periodic wave or signal every 10^21 seconds. This unit is used to measure extremely low-frequency phenomena, such as geological or astrophysical events, where a higher resolution in frequency domain is required.