Atomic Clock Link

An atomic clock is the world’s most accurate timekeeping device. While a grandfather clock relies on a swinging pendulum and a digital watch relies on a vibrating quartz crystal, an atomic clock uses the ultra-stable vibrations of atoms—usually cesium or strontium—to measure the passage of time. How It Works

GPS satellites carry atomic clocks. Because radio signals travel at the speed of light, even a billionth of a second of error could result in your GPS being off by several miles. Atomic Clock

You likely interact with atomic clocks every day without realizing it: An atomic clock is the world’s most accurate

Scientists use these clocks to detect tiny changes in gravity (General Relativity) and to search for dark matter. Precision Limits Because radio signals travel at the speed of

High-speed data transfers and cellular networks require perfectly synchronized "stamps" to ensure packets of data arrive in the correct order.