Question

One second is defined to be equal to :

• A. 1650763.73 periods of krypton clock
• B. 652189.63 period of krypton clock
• C. 1650755.73 periods of cesium clock
• D. 9, 19, 26, 31, 770 periods of cesium clock

Answer 1

The correct option is D 9, 19, 26, 31, 770 periods of cesium clock

Time taken to complete 9, 19, 26, 31, 770 periods of cesium clock is equal to one second.