A proton or a neutron can sometimes "violate" conser- vation of energy by emitting and then reabsorbing a pi meson, which has a mass of 185 MeV/c². This is possi- ble as long as the pi meson is reabsorbed within a short enough time At consistent with the uncertainty principle, (a) Consider p → p + л. By what amount AE is energy conservation violated? (Ignore any kinetic energies.) (b) For how long a time At can the pi meson exist? (c) Assuming that the pi meson travels at very nearly the speed of light, how far from the proton can it go? (This procedure, as we discuss in Chapter 12, gives us an

What is the approximate uncertainty in the mass of a muon, as determined from its decay lifetime?

Find the uncertainty in frequency due to lifetime boradening using the Breit-Wigner formula if the lifetime of an excitation in a Cd/Se quantum dot is 25ns and it emits light at a wavelength of 550nm when it decays.

A neuto is moving at a speed of 71 m/s a.) The debregoli wavelength associated with the neutron is _________ nm. b.) If another neutron B travels at four times the speed of neutron A, the ratio of the wavelengths of neutron B to neutron A will be ______. c.) If the uncrtainty of measuring the speed of neutrons is 2.8 m/s The min. uncertainty in measuring the position of the neutron is _____m.

When the position of a neutrino is measured, it has an uncertainty of 3.38 x 1018 meters. If the momentum is measured at the same time, calculate the minimum uncertainty in the momentum.

Compare the gravitational potential energy, mgh, exerted on an electron 100 m above theearths surface to the potential energy exerted on an electron by a hydrogen nucleus at adistance of 1 Angstrom. What does this imply?