By which of the following are very small time intervals accurately measured?

Options :
  1. Pulsars
  2. Quartz clocks
  3. Atomic clocks
  4. White dwarfs
Answer and Explanation :-

Answer: Option 3

Explanation:

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I believe the simplest explanation is, there is no God. No one created the universe and no one directs our fate. This leads me to a profound realization that there probably is no heaven and no afterlife either. We have this one life to appreciate the grand design of the universe and for that, I am extremely grateful.
-Stephen Hawking