How Long to Walk the Planck?

One of the smallest units of measurement of time is the Planck time (tP). It is the time required for light to travel, in a vacuum, a distance of one Planck length, approximately 5.39 × 10−44 s.

To give you an idea of how small this is, in one second there are more Planck times than there have been seconds since the Big Bang, which occurred 14 billion years ago.

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