IB DP Physics: HL复习笔记12.1.10 Tunnelling
Tunnelling Single potential wells lead to quantised energy levels and their associated wavefunctions The wavefunction extends throughout space However, for infinitely deep square wells the wavefunc...
IB DP Physics: HL复习笔记12.1.9 The Uncertainty Principle
The Uncertainty Principle The quantisation of energy levels and their associated wave functions leads to some surprising outcomes One of these outcomes is known as the uncertainty principle The unc...
IB DP Physics: HL复习笔记12.1.8 The Wave Function
The Wave Function Bohr showed that the angular momentum of an electron orbiting a hydrogen atom was quantised He also showed that the allowed electron energies were also quantised Unfortunately, th...
IB DP Physics: HL复习笔记12.1.7 Quantization of Angular Momentum
Quantization of Angular Momentum Angular momentum is a property of any spinning or rotating body, very similar to linear momentum In linear motion, momentum is the product of mass and velocity In r...
IB DP Physics: HL复习笔记12.1.6 Pair Production & Annihilation
Pair Production & Annihilation Annihilation When a particle meets its antiparticle pair, the two will annihilate Annihilation is: When a particle meets its equivalent anti–particle they both ar...
IB DP Physics: HL复习笔记12.1.5 Matter Waves
Matter Waves De Broglie proposed that electrons travel through space as a wave This would explain why they can exhibit behaviour such as diffraction He therefore suggested that electrons must also ...
IB DP Physics: HL复习笔记12.1.4 Solving Photoelectric Problems
Solving Photoelectric Problems Since energy is always conserved, the energy of an incident photon is equal to: The work function + the maximum kinetic energy of the photoelectron The energy within ...
IB DP Physics: HL复习笔记12.1.3 Observing the Photoelectric Effect
Observing the Photoelectric Effect The photoelectric effect can be observed on a gold leaf electroscope A plate of metal, usually zinc, is attached to a gold leaf, which initially has a negative ch...
IB DP Physics: HL复习笔记12.1.2 The Photoelectric Effect
The Photoelectric Effect The photoelectric effect is the phenomena in which electrons are emitted from the surface of a metal upon the absorption of electromagnetic radiation Electrons removed from...
