The atomic clock is a device that counts the periods of the atomic frequency standard.

These are the most accurate clocks known to mankind.

Atomic clock interesting facts


1. The first atomic clock was built in 1949 at the US National Institute of Standards and Technology by Harold Lyons.

2. The atomic clock is one of the most perfect man-made devices.

3. The accuracy of the atomic clock is 0,000,000,000,000,000,001 seconds.

4. Microwaves with a frequency of 9 192 631 770 vibrations per second excite atoms. Thanks to this, the electron moves to a higher energy level.

Added: Beny

5. Colorado in the United States has the world’s most accurate atomic clock. One second late every 15 billion years.

Added: Mika

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Atomic clock questions and answers


Why do you need such accurate clocks?

They are used by scientists who study events that last a millionth of a second.

Answer: Beny


How accurately does an atomic clock tell time?

Accurate to the attosecond (1 trillionth of a second).

Answer: Beny


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