Zusammenfassung der Ressource
AS Physics Unit 1
- Particles and Radiation
- Atomic Structure
- Baryon- 3 Quarks
- Meson-Quark
antiquark pair
- Leptons- Fundamental
- Stable and
Unstable Nuclei
- Beta+ Decay
- Loses a Proton
- Beta- Decay
- Gains a Proton
- Alpha Decay
- Loses a Helium Nucleus
- Particle Classification
- Hadrons
- Baryons
- Mesons
- Leptons
- Exchange Particles
- Electromagnetic
Photon
- Weak Force
W Boson
- Feynman Diagrams
- Beta Plus Decay
- Beta minus Decay
- Electron Capture
- Quantum Phenomena
- Photoelectric Effect
- Light of a certain frequency or
higher can start the
photoelectric effect
- Photoelectric effect is where
electrons are ejected from a
metals surface
- Work Function is the
required energy to start the
effect
- Threshhold Frequency is where
the energy of the light is equal
to or greater than the work
function
- Energy Levels
- Excitation
- Where an electron on an
atom moves up a shell,
further from the nucleus
- Happens when a photon or
electron of the precise energy
of the shell difference strikes
the electron
- Becomes De-excited
when the atom returns to
its ground state. This releases a photon
- Ionisation
- When an electron is struck
clean out of the atom
- Current Electricity
- Definitions
- Current is the rate of flow of charge
- Pd is the energy per unit charge
- Resistance is a measure of how
difficult it is for current to flow
- Equations
- Q=IT
- V=W/Q
- V=IR
- P=VI
- (Look up line shapes for
components on a V/I Graph)
- Circuits
- Parallel
- Pd(in)=Pd(out)
- 1//R(total))=1/R1+1/R2...+1/Rn
- Series
- Pd Split between
Components
- R(total)= Sum of all resistors
- Pd(in)=Pd(out)
- Facts
- Ohmic Conductor= Constant resistance
- Potential dividers use resistors to
get required Pd to components