Wall Clocks Review
Archive for the ‘Atomic Wall Clocks’ Category
Obviously accuracy is extremely valuable when choosing any time piece. Clock manufacturers use different methods to insure accuracy. An atomic wall clock ‘or Radio Controlled Clock‘ updates automatically through a signal received from a radio station.
This signal ensures accuracy to within seconds of the official time. A digital atomic clock is highly accurate, but if one plans to use it in an office building with a lot of steel, the signal from the radio station may not be strong enough.
Time is a basic part of life. We use it to adhere to schedules so we can do our daily activities on time. Accurate time measurement plays an important role in many facets of our modern world. To achieve this, GPS satellites broadcast timing signals to atomic clocks or watches so that everyone all over the world can keep to agreed timetables.
It was on New Year’s Day in 1972 when the coordinated universal time was adopted as the official time for the world. The role of official timekeeper of atomic time for the world was assigned to the International Bureau of Weights and MEasures (BIPM). There are 65 laboratories with over 230 clocks that contribute to the international timescale.
An atomic clock is a type of clock that uses an atomic resonance frequency standard as its timekeeping element. They are the most accurate time and frequency standards known, and are used as primary standards for international time distribution services, and to control the frequency of television broadcasts and GPS satellite signals.
Atomic wall clocks do not use radioactivity but rather the precise microwave signal that electrons in atoms emit when they change energy levels. Early atomic clocks were masers with attached equipment. Currently the most accurate atomic clocks are based on absorption spectroscopy of cold atoms in atomic fountains such as the NIST-F1.