2022年10-12月高含金量经济商科竞赛汇总
申请美国大学越来越内卷，尤其是名校申请。复盘近三年被TOP20录取的大陆学生，或多或少都有学术活动经历，甚至有家长总结“学术活动是申请TOP20的标配”。虽然不是很准确，但已经足以说明“内卷”程度。 2022年已过大...
Edexcel A Level Physics:复习笔记5.34 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...
Edexcel A Level Physics:复习笔记5.33 Energy of a Photon
Energy of a Photon Photons are fundamental particles which make up all forms of electromagnetic radiation A photon is a massless “packet” or a “quantum” of electromagnetic energy What this means is...
2022年10-12月高含金量人文社科竞赛汇总
申请美国大学越来越内卷，尤其是名校申请。复盘近三年被TOP20录取的大陆学生，或多或少都有学术活动经历，甚至有家长总结“学术活动是申请TOP20的标配”。虽然不是很准确，但已经足以说明“内卷”程度。 2022年已过大...
Edexcel A Level Physics:复习笔记5.32 Wave-Particle Duality
Wave-Particle Duality Light can behave as a particle (i.e. photons) and a wave This phenomenon is called the wave-particle nature of light or wave-particle duality Light interacts with matter, such...
Edexcel A Level Physics:复习笔记5.31 Pulse-Echo Technique
Pulse-Echo Technique Foetal Scanning In medicine, ultrasound can be used to construct images of a foetus in the womb An ultrasound detector is made up of a transducer that produces and detects a be...
Edexcel A Level Physics:复习笔记5.30 Transmission & Reflection of Waves
Transmission & Reflection of Waves When waves are incident on the interface between two different media, they are either transmitted or reflected 'Incident on' simply means 'to meet' The interf...
Edexcel A Level Physics:复习笔记5.29 The de Broglie Equation
The de Broglie Equation Using ideas based upon the quantum theory and Einstein’s theory of relativity, de Broglie theorised that not only do EM waves sometimes behave as particles, but that very sm...
Edexcel A Level Physics:复习笔记5.28 The Wave Nature of Electrons
The Wave Nature of Electrons Electron diffraction was the first clear evidence that matter can behave like light and has wave properties This is demonstrated using the electron diffraction tube The...
