List of unit of time | Time Wiki | Fandom
Unit Length, Duration and Size Notes Other xentojiffy (physics)3 × 10⁵³s: The amount of time it hypothetically takes light to hypothetically travel one Fermi (hypothetically the size of a nucleon) in a vacuum. This is the shortest time unit hypothetically possible to understand in physics. All hypothetically smaller time units have no hypothetical use in physics. yoctojiffy (physics) 3 × ...