Convert Microsecond (µs) to Femtosecond (fs) instantly.
About these units
Microsecond (µs)
A microsecond equals one millionth of a second (10⁻⁶ s) and belongs to the realm of electronics, high-speed computation, radar systems, and signal processing. In digital electronics, microseconds describe the switching times of microcontrollers, communication baud rates, and pulse-width modulation (PWM) frequencies. Flash memory access times, database latency, and embedded systems all use µs resolution. In aviation and radar, microseconds represent the time it takes for radio waves to travel hundreds of meters. In biology, neural synapse firing intervals and muscle micro-movements occur at microsecond timescales. The microsecond is essential for understanding everything from machine communication to the fast nuances of living organisms.
Femtosecond (fs)
A femtosecond equals 10⁻¹⁵ seconds, a staggering scale where fundamental molecular motions occur. Chemical bonds vibrate, break, and rearrange on femtosecond timescales. Ultrafast spectroscopy—pioneered by Ahmed Zewail, who won the Nobel Prize for this work—uses femtosecond laser pulses to "freeze" molecular reactions and observe them in real time. Femtosecond lasers allow extraordinary precision in surgery and microfabrication, producing minimal heat diffusion and ultraclean cuts. At this scale, time ceases to be a continuous blur and becomes granular in terms of molecular motion, giving rise to the field of femtochemistry and revolutionizing our understanding of reaction dynamics.