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Unformatted text preview: Problems: Due 9/30 7 . 10( Graded ) (1) 1. (easy) Suppose one photon has an energy of 200MeV and is traveling along the x axis. Suppose another has an energy of 100MeV and is traveling along the y axis. (a) What is the total energy of this system? (b) If a single particle had this same energy and moemntum, what would be its mass? (c) In what direction would it be traveling? (d) With what speed? 2. (medium, Graded ) A particle as observed in a certain reference frame (i.e. observer A ) has a total energy of 5GeV and a momentum of 3GeV /c (i.e. cp which has the dimension of energy, is equal to 3GeV ) (a) What is the energy in the frame in which its momentum is equal to 4GeV / c, i.e. an observer B moving with velocity v relative to A measures a momentum of 4GeV / c. (b) What is its rest mass in GeV/c 2 and what is the ratio between this mass and the proton mass? (c) What is the relative velocity of the two frames? 3. ( medium ) A neutral meson ( o ) decays into two rays (and nothing else). If a o (whose rest mass is 135MeV is moving with a kinetic energy of 1GeV: (a) What are the energies of the rays if the decay process causes them to be emitted in opposite directions along the pions original direction....
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This note was uploaded on 01/25/2012 for the course PHYSICS 251 taught by Professor Staff during the Fall '11 term at SUNY Stony Brook.
 Fall '11
 Staff
 Energy, Photon

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