It Has Been Suggested That a Fundamental Physical Unit of Time

question 4

Multiple Choice

It has been suggested that a fundamental physical unit of time is the time required for light to traverse the diameter of the nucleus of an atom (approximately 3 $\times$ 10^-13 m) .This unit of time is approximately

• A)1 s
• B)10^-4 s
• C)2 \(\times\) 10^-20 s
• D)10^-21 s
• E)10^-23 s