Leaving Cert. Physics - Revision Headings
Optics
Laws of reflection
Mirrors
1/f=1/u +1/v
m= v/u
Uses of mirrors
Laws of refraction
sin i = n x sin r
n = real depth/apparent depth
n = c1/c2
Total internal reflection
Critical angle
n = 1/sin c
Optical fibres
Lenses
P= 1/f
P = P1 + P2
The eye (structure & defects)
Mechanics
Vectors (Composition & resolution)
Displacement
Velocity & Speed
Acceleration
v = u + at (derivation)
s = ut + 1/2at2 (derivation)
v2 = u2 + 2as (derivation)
Momentum (& conservation)
Newton's laws of motion
F = ma (derivation)
Newton's law of universal gravitation
F = G m1m2/d2
W = mg
g = G M/R2 (derivation)
=s/r
=/t
v = r (derivation)
a = r 2 or v2/r
F = mr2 or mv2/r
T = 2/
Satellites
T2 = 42d3/GM (derivation)
f
Density
 = m/v
Pressure
p = F/A
p = gh
The bends
Boyle's law
Archimedes' principle
Law of flotation
Moments
Moment of a force = force x distance from the fulcrum (T = Fr)
Levers
Couples (T = Fd)
Conditions for equilibrium
Simple harmonic motion
a = -2s
Hooke's law
F = -ks
2 = k/m
Pendulum
T = 2 √l/g
Work
W = Fs
Energy
Ep = mgh
Ek = ½ mv2
E = mc2
Renewables
Principle of conservation of energy
Power
Efficiency = Power out/Power in x 100%
Waves
Longitudinal & transverse
Frequency
Amplitude
Wavelength
c = f
Reflection
Refraction
Diffraction
Interference (constructive, destructive)
Interference patterns
Stationary waves
Polarisation
Resonance
Doppler effect
f' = c f/(c +/- v)
Sound
Speed
Wave properties
Characteristics of notes
Frequency limits of audibility
Vibrations in strings & pipes
f = 1/2l √T/
Sound intensity
Sound intensity level
Threshold of hearing
Light as a wave
Diffraction grating
n = d sin  (derivation)
Dispersion
Colours
Electromagnetic spectrum
The spectrometer
Heat & Temperature
Heat
Temperature
Kelvin scale
t /oC = T /K - 273.15
Thermometric properties
Thermometers
Heat capacity
Q = mc
Latent heat
Q = ml
Conduction, convection & radiation
Static Electricity
Charging by contact
Conductors & insulators
The Gold leaf electroscope
Charging by induction
Forces between charges
Coloumb's law
F = 1/4 x Q1Q2/r2
Point effect
Charge resides on outside
Photocopier & precipitator
Electric fields
Electric field strength
E = F/q
E = 1/4 x Q/r2
Potential difference
W = V/Q
Capacitance
Uses of capacitance
C = Q/V
C = A /d
W = ½ CV2
Current electricity
Electric current
I = Q/t
Definition of the ampere
Electromotive force (emf)
Sources of emf
Conduction in materials (inc. graphs)
Resistance
Ohm's law
V = IR
Potential divider
R = R1 + R2 (derivation)
1/R = 1/R1 + 1/R2 (derivation)
Resistivity
R =  l/A
Wheatstone bridge
R1/R2 = R3/R4
Metre bridge
R1/R2 = l1/l2
Semiconductors
Diodes
LDR & LED
Heating effect of an electric current
Joule's law
P = RI2
P=VxI
Transmission of electrical power
Chemical effect
Magnetic effect
Domestic electricity
The kilowatt-hour
Number of kW hr = power (in kW) x time (in hours)
Magnetism
Magnetic poles
Magnetic fields
Fields due to currents
Force on current-carrying conductor in magnetic field
F = BIl
Left hand rule
F = qvB (derivation)
Electromagnetic induction
Magnetic flux
= BA
Faraday's law
E = d/dt
Lenz's law
Self induction
Inductor
Mutual induction
Transformer
Vi/Vo = Np/Ns
A.C. & D.C.
Root-mean-square
The electron
Properties
Electron-Volts
Thermionic emission
Cathode rays
Cathode ray tube
Photoelectric effect
E = hf
Threshold frequency
 = hfo
Einstein's photoelectric law
hf =  + ½ mv2
X-rays
X-ray tube
X-ray properties
Nuclear Physics
Rutherford's gold foil experiment
Bohr model of the atom
Emission line spectra
hf = E2 - E1
Isotopes
Radioactivity
Uses of radioactivity

Geiger-Muller tube
Law of radioactive decay
dN/dt = - N
T½ = ln2/
Fission & Fusion
Nuclear reactors
Health hazards of ionising radiation
Particle physics
Discovery of the neutrino
Cockcroft & Walton experiment
Particle accelerators
Creating new particles
Antimatter
Four fundamental forces of nature
Quarks
Classifying particles.