The cosmic background radiation observed is starlight. a) True b) False
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The cosmic background radiation observed is starlight.
a) True
b) False
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- 12. What is the wavelength of the photons produced in electron-positron pair annihilation?Two protons experience a head-on collision moving with velocity v. In order for there to be enough energy to create a new proton- antiproton pair, the velocity of each proton must equal? A) 2c B) 0.866c .914c D) 1.414c7. What are the wavelengths of the two photons produced when a proton and antiproton annihilate? 8. The A° cannot decay by the following reactions. What conservation laws are violated in each of the reactions? (а) Л° - п+п-. (b) A° + p+ K¯. (c) A° + n+ + T¯.
- 5. How much energy is released in the decay + → µt + v„? 6. How much energy is required to produce a neutron-antineutron pair?2) We have discussed in the lectures that on the equator earth's magnetic field is approximately 50µT in strength and points northward. Suppose a proton from the sun manages to get through the van Allen belt and hits the magnetic field at a right angle with a speed of v= 150km/s. We have discussed in class that the particle will move on a circle path. a) What is the radius of this path? b) What is the synchrotron frequency?