. 3. Draw eight fourth order processes for electron - positron pair production in the context of Quantum Electrodynamics (QED). Pair Production . 3. Draw eight fourth order processes for ele...
Problem 4. Electron-positron production An electron-positron pair (positron is electron’s antiparticle, it has the same mass as electron, but opposite charge) can be produced what two photon are collided. Two photons of frequency ω are collided head-on. What will be the electron’s momentum? Electron’s rest mass is me.
3. A photon creates a electron-positron pair. The kinetic energy of the electron is 2.20 times that one of the positron. What is the kinetic energy of the electron if the energy of the photon is 2.80 times the rest mass energy of the electron? (The rest mass of a electron is 9.11 x10-31 kg.) O 0.128 MeV O 0.819 MeV O 0.281 MeV O 0.409 MeV O 0.186 MeV
Particle Physics Let's do a little particle physics. Back in the '9os there was a large electron-positron collider at CERN in Geneva, Switzerland, called the "Large electron-positron collider," or LEP for short. (This collider was broken down and rebuilt into an even larger one that runs to this day, called the "Large hadron collider" or LHC.) It was LEP that discovered the W and Z bosons, which mediate weak nuclear processes like the beta decay of free neutrons Anyway, near...
3. mer How many electrons in an atom can have each of the following quantum designations! 2 fourth period and forbital C. -41-3m--12 d. 3p 4. (pt) Why does the size of atoms increase going down a group on the periodic table? 5. (pt) What is a quanta of energy? 6. (pt) How does an atom generate atomic emission spectra? 7. (pt) Rank the following in order of increasing first ionization energies Ge, K. C S and Si X (pt...
Which of the following elements has at least one electron in which the magnetic quantum number (m) equals -3? Neodymium Iridium Cadmium Cobalt Darmstadtium Selenium Silicon Carbon Q: What is true of the most stable resonance structure for CH2CH2? Carbon is sp3 hybridized Carbon bears a lone pair There is one pi bond between the two carbon atoms The bond order between the carbon-carbon bond is 2 Hydrogen bears a lone pair Carbon is sp2 hybridized The molecular geometry around...
1. [6.4% ) Write down the electron configuration for Br. 2. [6.4 %) Draw resonance structures for (a) NO:, (b) NNO (a) N-NEO (b) NN-o 3. [6.4%) In which pair do both compounds exhibit predominantly covalent bonding? A. BaCl and H-O B. NaBr and SO C. K O and NBr D. CCl and Asl 4. [6.4 % ) Rank the following hydrocarbons in order of increasing vapor pressure: CHe, CvoH, CH, CH16, C22H 5. [6.4%) O and N2 in air...