The Electronvolt The electronvolt is a unit which is commonly used to express very small energies This is because quantum energies tend to be much smaller than 1 Joule The electronvolt is derived f...
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...
和體制內(nèi)一樣，英國教育部也會在“黃金九十月”發(fā)布GCSE最新考試政策，各大考試局會根據(jù)教育部的相關(guān)政策，做出相應(yīng)回復(fù)，修改考試大綱，增減主題內(nèi)容。 英國教育部和考試監(jiān)管機(jī)構(gòu)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...
