Microsecond (µs)
The microsecond, symbolized as µs, is one millionth of a second. This very short time is important in electronics, communication, and research. Microseconds are used to measure signal delays, computer speeds, and fast changes. As digital technology grew in the 1900s, measuring microseconds became necessary. Today, this accuracy supports applications such as fast trading, medical imaging, and satellite communications.
Second (s)
The second is the fundamental SI unit used to measure time. At first, it was defined as 1/86,400 of the average length of a solar day. However, because the Earth’s rotation is not perfectly consistent, this method was imprecise. In 1967, scientists redefined the second based on atomic properties: one second equals the duration of 9,192,631,770 cycles of radiation from a cesium-133 atom. This atomic standard ensures remarkable accuracy in timekeeping, which is essential for technologies like GPS, communications, and scientific experiments. The second remains a cornerstone for tracking and organizing time in today’s world.