IB DP Physics: SL復(fù)習(xí)筆記4.3.5 Malus’s Law
Malus's Law Intensity of Polarised Light The?intensity?of unpolarised light is reduced as a result of polarisation If unpolarised light of intensity?I0?passes through a polariser, the?intensity of ...
IB DP Physics: SL復(fù)習(xí)筆記4.3.4 Polarisation
Polarisation Transverse waves can oscillate in any plane perpendicular to the direction of motion (and energy transfer) of the wave Such waves are said to be?unpolarised When a transverse wave is?p...
IB DP Physics: SL復(fù)習(xí)筆記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 sup...
IB DP Physics: SL復(fù)習(xí)筆記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, int...
IB DP Physics: SL復(fù)習(xí)筆記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: SL復(fù)習(xí)筆記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: SL復(fù)習(xí)筆記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: SL復(fù)習(xí)筆記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...
美國(guó)大學(xué)畢業(yè)起薪最低的專業(yè)是什么？
眾所周知，花了這么多錢出國(guó)留學(xué)，不僅要關(guān)注大學(xué)排名和專業(yè)熱度，薪資和就業(yè)前景同樣很重要！ 美國(guó)大學(xué)畢業(yè)起薪最低的專業(yè)是什么？最近，U.S.News參考各專業(yè)本科畢業(yè)生工作三年后的薪酬數(shù)據(jù)，又整理出了10個(gè)畢業(yè)...
IB DP Physics: SL復(fù)習(xí)筆記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: SL復(fù)習(xí)筆記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: SL復(fù)習(xí)筆記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...
