Particles, antiparticles and photons (AQA A-Level Physics): Quizzes

Same mass and rest energy, opposite charge

Positron

0.511 MeV

$+1.6 \times 10^{-19}$ C

They carry energy but have no mass

$E = hf$

$6.63 \times 10^{-34}$ J s

Both convert to energy as two gamma photons

To conserve momentum

Greater than combined rest energy