Quantum Phenomenon Flashcards
What are cosmic rays
High energy particles travelling through space
What 2 groups can particles be divided into
Hadrons and leptons
What can hadrons be divided into
Baryons and mesons
Mesons are composed of
A quark and anti-quark
Baryons are composed of
3 quarks
Composition of proton
Up up down
Neutron composition
Up down down
Composition of anti proton
Anti-up anti-up anti-down
What is the composition k^0
Down anti-strange or strange anti-down
K^+ composition
Up anti-strange
Pi ^- composition
Down anti-up
Pi^+ composition
Up anti-down
Pi^0 composition
Anti-up up or anti-down down
K^- composition
Strange anti-up
K^0 composition
Strange anti-down
What is the only stable baryon
A proton
What is always conserved in a particle equation
Energy, momentum,lepton number,baryons numbers and charge.
Photoelectric effect
The effect where certain frequencies of light are capable of stripping electrons from a metal surface
Equation for energy of a photon
E=hf
What is the equation for maximum kinetic energy of a photo electron
E(kmax) =hf-Φ
How is stopping potential found
It’s by applying a charge against the photo electrons as they fly towards the detection plate
Ionisation
The process of creating ions
Excitation
The process of electrons jumping orbital shells due to energy change
De-excitation
The process of an electron dropping down from a high orbital level and releasing energy.
Ways an electron can be excited
Collision and photons
What are the orbital levels
Discrete
