Quantum Flashcards
1
Q
Mediating particle for the electromagnetic force?
A
Virtual photon
2
Q
Mediating particle for gravitational force?
A
Graviton (undiscovered)
3
Q
Mediating particle for strong interaction?
A
Gluons for quarks, pions for nucleons
4
Q
Range of strong force?
A
Att 4-0.4 femto-meters, repulse below 0.5 femto-meters (1.0x10^-15)
5
Q
What is apha decay?
A
Ejection of helium 2+ ion from parent nucleus to stabilise itself.
6
Q
What is beta decay?
A
B+ P->N + electron neutrino + positron
B- N->P + electron anti-neutrino + electron
7
Q
Speed of wave?
A
C=f x (lander)
8
Q
Energy of a particle
A
E=hf
9
Q
Annihilation is opposite of
A
Pair production
10
Q
Anti particles vs particles
A
Same mass
Same rest energy
Opposite charge
11
Q
Rest energy found by
A
E=MC^2
