Creating/Destroying Electron-Positron Pairs: Time Limit?

[S1CkFiSh]

The rest energy of an electron is 0.511 MeV = 8.2 x10-14 J. A positron is an electron with positive charge and the same rest energy. Within what time interval can we create and destroy an electron-positron pair without worrying about the conservation of energy? h = 6.626 × 10-34 J s.

 

[tiny-tim]

Hi S1CkFiSh!

Show us what you've tried, and where you're stuck, and then we'll know how to help!