Question

7. One second is equal to
(a) Time required for 1650763-73 vibrations of Krypton atom

(b) Time required for 652189-63 vibrations of Kryp ton atom

(c) Time required for 1650755-73 vibrations of ce sium atom

(d) Time required for 91926317-70 vibrations of sium atom.​

Answer 1

Answer:

One second is defined to be equal to :9, 19, 26, 31, 770 periods of cesium clock

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Answer 2

Answer:

d) Time required for 91926317-70

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