annihilation and pair production

Question 1

what is annihilation

Answer 1

when a particle collides with its antiparticle to create electromagnetic radiation in the form of 2 gamma ray photons

Question 2

the greater the mass of the particles the…

Answer 2

greater the energy of the photons

Question 3

what is rest energy

Answer 3

the energy that is stored inside a stationary particle as a result of its mass

Question 4

what is the equation for rest energy

Answer 4

E = mc^2

Question 5

in annihilation what is the rest energy equal to

Answer 5

the photon energy

Question 6

what do we presume in annilhation

Answer 6

that the kinetic energy is 0J

Question 7

what is the equation for the frequency of an emitted photon

Answer 7

E = hf

Question 8

what is pair production

Answer 8

where two photons collide to produce a particle and an antiparticle

Question 9

why are te particles produced in pairs

Answer 9

as charge needs to be conserved and momentum needs to be conserved

Question 10

what happens in pair production if the photon has a higher energy then the minimum energy required to create the particle pair

Answer 10

converted into kinetic energy

Question 11

how to calculate the kinetic energy of the particle

Answer 11

photon energy - minimum energy
divided by 2