In Order to Produce an Electron and a Positron,two Photons

question 30

Multiple Choice

In order to produce an electron and a positron,two photons must have a combined energy of:

• A)E > 2m_ec²
• B)E > m_ec²
• C)E > 1⁄2m_ec²
• D)E = m_ec²
• E)This cannot happen.