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...
申請美國大學越來越內卷，尤其是名校申請。復盤近三年被TOP20錄取的大陸學生，或多或少都有學術活動經歷，甚至有家長總結“學術活動是申請TOP20的標配”。雖然不是很準確，但已經足以說明“內卷”程度。 2022年已過大...
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...
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...
申請美國大學越來越內卷，尤其是名校申請。復盤近三年被TOP20錄取的大陸學生，或多或少都有學術活動經歷，甚至有家長總結“學術活動是申請TOP20的標配”。雖然不是很準確，但已經足以說明“內卷”程度。 2022年已過大...
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...
