Multiple choice general knowledge science & technology

What type of clock was first introduced by the US National Bureau of Standards in 1949?

  1. Atomic Clock

  2. Big Ben Alarm Clock

  3. Quartz clock

  4. Twelve O'Clock
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A Correct answer
Explanation

The first atomic clock, an ammonia maser, was developed at the US National Bureau of Standards (now NIST) and introduced in 1949. This groundbreaking invention revolutionized timekeeping by using atomic vibrations as the frequency standard, providing unprecedented accuracy.

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