The Photoelectric Equation 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 a ph...
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...
和体制内一样，英国教育部也会在“黄金九十月”发布GCSE最新考试政策，各大考试局会根据教育部的相关政策，做出相应回复，修改考试大纲，增减主题内容。 英国教育部和考试监管机构Ofqual官宣2022年秋季及2023年夏季...
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...
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...
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...
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...
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...
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...
