Question

1. What is an atomic clock? Where is it kept?
2. How is the velocity of light used for determining the
standard metre?​

Answer 1

Answer:

Explanation:The master atomic clock ensemble at the U.S. Naval Observatory in Washington, D.C., which provides the time standard for the U.S. Department of Defense

Answer 2

Answer:

1. An atomic clock is a clock that uses the resonance frequencies of atoms as its resonator. ... If you take any atom of cesium and ask it to resonate, it will resonate at exactly the same frequency as any other atom of cesium. Cesium-133 oscillates at 9,192,631,770 cycles per second.

The master atomic clock ensemble at the U.S. Naval Observatory in Washington, D.C., which provides the time standard for the U.S. Department of Defense.

2. Velocity of the ;light in air or Vacuum = 3 × 10⁸ m/s. For the convenience, We used to take the value as 3 × 10⁸ m/s. Although, For determine the definition of the meter, correct speed of the light is taken. 1 meter is defined as the distance travelled by the light in 1/299792000 s.

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