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The uncertainty in time realization of a cesium atomic clock is-


1. 1 × 10-16
2. 1 × 10-15
3. 1 × 10-14
4. 1 × 1015
5.

1 Answer

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Best answer
Correct Answer - Option 2 : 1 × 10-15

CONCEPT:

  • To measure time, we use the atomic standard of time that is based on periodic vibrations produced in a cesium atom.
  • Cesium clock: It is used at National Physical Laboratory, New Delhi to maintain the Indian standard of time.
    • It is also called the atomic clock.
    • The vibrations of the cesium atom regulate the rate of the cesium atomic clock.
    • Cesium atomic clocks provide very high accuracy.

EXPLANATION:

  • The uncertainty imparted in time realization is ± 1 × 10-15, e., one part in 10​-15.

Hence option 2) is correct.

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