CIE A Level Physics复习笔记8.2.1 Diffraction
What is Diffraction? Diffraction is the?spreading out?of waves when they pass an obstruction This obstruction is typically a narrow slit (an aperture) The extent of diffraction depends on the width...
CIE A Level Physics复习笔记8.1.2 Stationary Waves
Stationary Waves Stationary waves, or standing waves, are produced by the superposition of two waves of the same frequency and amplitude travelling in opposite directions This is usually achieved b...
CIE A Level Physics复习笔记8.1.1 The Principle of Superposition
The Principle of Superposition The principle of superposition states that?when two or more waves with the same frequency travelling in opposite directions overlap, the resultant displacement is the...
CIE A Level Physics复习笔记7.2.2 Polarisation
Polarisation Transverse waves are waves with their displacement perpendicular to their direction of travel. These oscillations can happen in?any plane?perpendicular to the propagation direction Tra...
CIE A Level Physics复习笔记7.2.1 Electromagnetic Spectrum
Properties of Electromagnetic Waves Visible light is just one part of a much bigger spectrum: The Electromagnetic Spectrum All electromagnetic waves have the following properties in common: They ar...
CIE A Level Physics复习笔记7.1.6 Doppler Effect for Sound Waves
Doppler Shift of Sound The whistle of a train or the siren of an ambulance appears to decrease in frequency (sounds lower in pitch) as it moves further away from you This frequency change due to th...
CIE A Level Physics复习笔记7.1.5 Transverse & Longitudinal Waves
Properties of Transverse & Longitudinal Waves In mechanical waves, particles oscillate about fixed points The direction of oscillations with regards to the direction of wave travel determine wh...
CIE A Level Physics复习笔记7.1.4 Wave Intensity
Wave Intensity Progressive waves transfer?energy The amount of energy passing through a unit area per unit time is the?intensity?of the wave Therefore, the?intensity?is defined as?power per unit ar...
CIE A Level Physics复习笔记7.1.3 The Wave Equation
Derivation of v = f λ Using the definitions of speed, frequency and wavelength, the wave equation?v?=?fλ?can be derived This is an important relationship between three key properties of a wave The ...
