Particles,antiparticles and photons cont Flashcards
What is annihilation
particle and anitmatter particle collide
What is mass converted to in annihilation
mass converted to energy (photon)
When an electron and a positron annihilate what happens and what MeV is required
two photons produced with atleast 0.51 MeV each and momentum is conserved
Where is positron and electron annihilation used medically
PET - glucose containing unstable isotope of O2 decays a positron which is annihilated and gamma photons detected
What is the opposite of annihilation
pair production
What happens with pair production
single photon becomes matter and anit matter particle
What is the equation with plancks constant
Energy = h f
What is h (plancks constant)
6.626*10^-34
What does the energy of a photon depend on
frequency of wave
What is E = hf also = to
E = hc/lamda
