IB DP Physics: HL复习笔记4.3.3 Superposition
Superposition The principle of superposition states that: When two or more waves meet, the resultant displacement is the vector sum of the displacements of the individual waves The principle of su...
IB DP Physics: HL复习笔记4.3.2 Amplitude & Intensity
Amplitude & Intensity Intensity The intensity of a wave is defined as follows: Power per unit area Intensity is measured in W m–2 Power is defined as: The rate of energy transfer Therefore, in...
IB DP Physics: HL复习笔记4.3.1 Wavefronts
Wavefronts Waves can be represented graphically in two different ways: Wavefronts - lines joining all the points that oscillate in phase and are perpendicular to the direction of motion (and energy...
IB DP Physics: HL复习笔记4.2.4 Sound Waves
Sound Waves Sound waves are longitudinal waves and, as such, require a medium in which to propagate Sound waves are generated by oscillating sources, which produce a change in density of the surrou...
IB DP Physics: HL复习笔记4.2.3 Electromagnetic Waves
Electromagnetic Waves An electromagnetic wave is generated by the combined oscillation of an electric and a magnetic field These fields oscillate perpendicular to each other and to the direction of...
IB DP Physics: HL复习笔记4.2.2 Transverse & Longitudinal Waves
Transverse & Longitudinal Waves In mechanical waves, particles oscillate about fixed points There are two types of wave: transverse and longitudinal The type of wave can be determined by the di...
IB DP Physics: HL复习笔记4.2.1 Properties of Waves
Properties of Waves Travelling waves are defined as follows: Oscillations that transfer energy from one place to another without transferring matter Energy is transferred by the waves, but matter i...
IB DP Physics: HL复习笔记4.1.4 Energy in SHM
Energy in SHM The total energy of an object oscillating with SHM is the sum of its potential energy (gravitational or elastic) and kinetic energy E = EP + EK Where: E = total energy in joules (J) E...
IB DP Physics: HL复习笔记4.1.3 SHM Graphs
SHM Graphs Displacement & Velocity The displacement-time graph for an object moving with SHM is a sinusoidal curve if: The object starts to oscillate from the equilibrium position. The equilibr...
