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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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