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
Related Physics A Level answers
All answers ▸If a 10N tension force is exerted on a steel beam (E = 200 GPa) with cross-sectional area 1cm^2, what is the stress acting on the beam? What is the change in length of the beam, if the beam is 10cm long?
If a wire loop moves at constant speed into a region where there is a magnetic field, why is a current induced in the wire?
A transmitter from a researcher's boat sends a signal to the seabed of waves speed 300m/s and it takes 5 seconds for the signal to return back to the boat. Calculate the depth of the sea there.
How is a particle moving in circular motion accelerating but not varying speed?