What is the efficiency of time realisation in cesium atomic clocks ?

Explanation

To determine the efficiency of time realization in cesium atomic clocks, we can follow these steps:

### Step 1: Understand the Uncertainty of Time Realization
The uncertainty of time realization in cesium atomic clocks is given as ±10^-13 seconds. This means that the clock can be off by this amount in its timekeeping.

### Step 2: Calculate the Maximum Gain or Loss in a Year
To find out how much the clock can gain or lose in a year, we need to convert the uncertainty into a yearly context.

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