AQA AS

AQA AS Physics Chapter 5 Optics LATEST UPDATE Normal Imaginary line perpendicular to the boundary between two materials or a surface. Partial reflection When some of the wave bounces off a surface, as it does when light moves from air to a refractive substance. Refractive index Ratio of sin i to sin r. Also the ratio of the speed of light in a vacuum to the speed of light in the material. Also the ratio of the wavelength of light in a vacuum to the wavelength of light in the material. ...

AQA AS Physics Chapter 5 Optics LATEST UPDATE Normal Imaginary line perpendicular to the boundary between two materials or a surface. Partial reflection When some of the wave bounces off a surface, as it does when light moves from air to a refractive substance. Refractive index Ratio of sin i to sin r. Also the ratio of the speed of light in a vacuum to the speed of light in the material. Also the ratio of the wavelength of light in a vacuum to the wavelength of light in the material. 1...

AS Level AQA Physics - Electricity LATEST UPDATE coulomb (C) unit of charge (one coulomb = charge flow in one second of one ampere current) ampere (A) unit of current (one ampere = one coulomb/second) current rate of flow of charge I = Q/t P = VI potential difference energy transferred per unit charge (work done in J in transforming one coulomb of charge from one point to another) V = W/Q current in series same voltage in series divided (bigger resistance = bigger share) cur...

AQA AS Physics Definitions - Waves LATEST UPDATE amplitude maximum displacement of a vibrating particle; for a transverse wave, it is the distance from the middle to the peak of the wave. antinode fixed point in a stationary wave pattern where the amplitude is a maximum. coherent two sources of waves are coherent if they emit waves with a constant phase difference. critical angle the angle of incidence of a light ray must exceed the critical angle for total internal reflection to occ...

AQA AS PHYSICS QUANTUM PHENOMONA LATEST UPDATE What is the photoelectric effect? Emission of electrons from a surface when a surface is illuminated by light of a frequency greater than the minimum value known as the threshold frequency. Photoelectric emission does not take place if ___________________ the frequency of the incident electromagnetic radiation is below a certain value known as the threshold frequency. The number of electrons emitted is ____________ proportional to the in...

AQA AS Physics Waves LATEST UPDATE Longitudinal Wave Direction parallel to oscillations Transverse Wave Direction perpendicular to oscillations Mechanical waves Need a medium to pass through Polarisation When waves are confined to one plane Polaroid sunglasses Absorb oncoming light while allowing vertical waves through Displacement distance from equilibrium Amplitude Maximum displacement Wavelength Distance between two adjacent particles Cycle Interval from a certain displa...

AQA AS Physics Mechanics LATEST UPDATE Terminal Velocity 1. Air resistance =0 & accelerates downwards 2. The speed and air resistance increases 3. Air resistance = weight, so a constant speed Terminal velocity for a parachute 1. Air resistance increases 2. Slows down, which decreases air resistance until it's balanced, taking a lower terminal velocity Factors affecting terminal velocity Shape Viscosity Lower impact force If impact time is greater Density mass per unit volume Ho...

AQA AS Physics FULL SET LATEST UPDATE Analyse Interpret data to arrive at a conclusion. Annotate Add notation or labelling to a graph, diagram or other drawing. Apply Use information in a new context. Calculate Work out the value of something. Comment Make a judgement based on a value. Compare Identify similarities and/or differences. Construct Assemble a piece of equipment (during practical work). Deduce Draw conclusions from information provided. Describe Give an accoun...

Physics Waves AQA AS LATEST UPDATE What does a wave do? Transports energy from one place to another What are mechanical waves? Mechanical waves use particles to transfer energy (neighboring particles bump into each other and set their neighbors moving) What are electromagnetic waves? Electromagnetic waves don't use particle vibration to transfer their energy and can therefore travel through a vacuum. e.g. light What is the unit of frequency? Hertz (Hz) What is the wave equation? ...

AQA AS Physics Definitions LATEST UPDATE Specific charge the charge to mass ratio or charge in coulombs divided by the mass in kilograms Isotope a nucleus with the same number of protons but different number of neutrons Hadron a particle that experiences the strong nuclear force. Composite particles made of either qqq (baryons) or q anti-q (baryon) Antimatter Particles with the same mass but opposite charge Photoelectric effect the emission of electrons from metal surfaces by lig...