In a process called pair production, a photon is transformed into an electron and a positron. A

Question:

In a process called pair production, a photon is transformed into an electron and a positron. A positron has the same mass (m_e) as the electron, but its charge is +e. To three significant figures, what is the minimum energy a photon can have if this process is to occur? What is the corresponding wavelength?

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