Explain the process of annihilation?

Matter and antimatter will annihilate if they meet:
1) Particle meets antiparticle.
2) Both have rest energies due to their masses.
3) Both have kinetic energies due to their movement (if they are moving).
4) They annihilate to produce 2 photons which move in opposite directions.
5) Each photon energy = ½ the total (rest energy + kinetic energy).

CD
Answered by Chris D. Physics tutor

4911 Views

See similar Physics A Level tutors

Related Physics A Level answers

All answers ▸

A positively charged particle enters a magnetic field oriented perpendicular to its direction of motion. Does the particle: A) Change its velocity, B) Change its speed, C) Accelerate in the direction of the magnetic field.


What is the difference between a longitudinal and a transverse wave?


Derive an expression for wave speed in terms of wavelength and frequency.


What happens to ice when energy is supplied at a constant rate in terms of the changes in energy of the molecules?


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

MyTutor is part of the IXL family of brands:

© 2025 by IXL Learning