"Photon" Essays and Research Papers

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Photon The photon is massless,[Note 2] has no electric charge,[12] and is stable. A photon has two possible polarization states and is described by exactly three continuous parameters: the components of its wave vector, which determine its wavelength λ and its direction of propagation. The photon is the gauge boson for electromagnetism,[13] and therefore all other quantum numbers of the photon (such as lepton number, baryon number, and flavour quantum numbers) are zero.[14] Photons are emitted...

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Quantum Cryptography

Noor Afshan Fathima III sem Computer Science and Engineering P E S College of Engineering Mandya, India. mr.arkadeb@rediffmail.com afshan.shokath@gmail.com nagraj.hpk@gmail.com Keywords— Cryptography, Quantum Cryptography, Photons, Polarization, Key. I. Introduction Privacy is paramount when communicating sensitive information, and humans have invented some unusual ways to encode their conversations. Quantum cryptography describes the use of quantum...

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blue sky

at high energy (> ionization energy) e.m. radiation can now be considered a “particle” (photon) scattering = photon-electron collision QM scattering theory Quantized electromagnetic field Feynman Diagrams 8 HIGH-ENERGY The classical picture fails collision Photoelectric effect: photon absorbed, electron emitted Compton Scattering Pair production (E>1.022 MeV) 9 MIT OpenCourseWare...

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Monte carlo Radiation Therapy lab

particles. EGS (Electron Gamma Shower) code will be used to do the MC simulation, it is capable of producing simulations with photons and electrons on media with various geometries; this will allow us to observe the effects of the homogeneity of the media on the Monte Carlo simulation. The user code DOSRZnrc will be used to determine the does deposited by the photons and electrons in a cylindrical geometry. Procedure and Observations Part 1a): ...

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Quantum Theory: How It Drastically Changed the Way We Look at Our Physical World

which were later given the term ‘photons'. The energy contained in each photon depends on the frequency of the light in which they are found. The energy of the emitted photoelectron can be determined using the equation E = hf, where h is Plank's constant, 6.626 x 10 –34 J/Hz. According to Einstein's theory an electron is ejected from the metal by a collision with a single photon in the process, all the photon energy is transferred to the electron and the photon ceases to exist. However, the...

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Photoelectric Effect

radiation, such as visible light, that is above the threshold frequency. This is because electrons cannot get enough energy to overcome their atomic bonding. The photoelectric effect furthered wave particle duality, whereby physical systems (i.e.: photons in this case) can display both wave - like and particle – like properties and behaviours, a concept used by the creators of quantum mechanics. It was explained mathematically by Einstein, utilising work in quantum mechanics, and was developed by people...

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Dual Nature of Matter

photocell. How will the stopping potential vary if frequency is increased, keeping other factors constant. Q.4. Why are De-Broglie waves associated with a moving football not visible. The wavelength of a photon and De-Broglie wavelength of an electron have the same value. Show that the energy of the photon is ( 2mcλ ) / h times the kinetic energy of the electron. Q.5. Electrons are emitted from a photosensitive surface when it is illuminated by green light but electron emission does not take place...

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Flame Test

Discussion Questions 1. Why do different metals have different characteristic flame test colours? The photons emitted during the test precisely match the quantum energy difference between the excited state and the ground state. For different elements the spacing between the ground state and the higher energy levels is different. So different elements have different flame test colours. 2. Most salts contain a metal and a non-metal. Look at the compounds we tested and determine whether it is...

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Quantum Mechanics Homework

do not radiate photons and spiral down into the nucleus, as required by the classical electromagnetic theory. However, the temporary confinement of an electron inside the nucleus creates a huge boost of its momentum that launches the electron out of the nucleus. 9. Photon Diffraction a. A photon passing through a horizontal slit is, momentarily, in a superposition of various vertical momentum states. As the photon exits the slit, one of these states materializes and the photon may deflect from...

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Physics Unit 2 Past Paper

inputs X is theoutpur. and A 0 0 B 0 1 X 0 0 r 0 t [2 marks] Total 10 marks GO ON TO THE NEXT PAGE 002474/CAPE 2403 16- 7. (a) State THREE experimental facts about the photoelectric effect which support the particulate (photon) model of light. [3 marks] ( b) W he n u l tra v i o l e t l i g h t i s i n c i d e n ton an i nsul atecl metal pl atc, thc pl ate emi ts el ectrons for a while and then stops. Explain why the process'eventually stops. [1 mark ] (c) The energy...

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