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Chapter 12: Fundamental Particles and Interactions

Expert-verified
Modern Physics
Pages: 523 - 558
Modern Physics

Modern Physics

Book edition 2nd Edition
Author(s) Randy Harris
Pages 633 pages
ISBN 9780805303087

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Illustration

54 Questions for Chapter 12: Fundamental Particles and Interactions

  1. From the masses of the weak bosons given in Table 12.1, show that range is of weak part of electroweak force should be about 10−3 fm.

    Found on Page 555

  2. Someone proposes the existence of a new force whose range is10-20 m. We found in Chapter 2 that accelerator turn kinetic energy into mass. About how much energy do you estimate an accelerator would need to create the mediating particle for such a force.

    Found on Page 555

  3. As in electron-positron annihilation, when a proton and antiproton annihilate. Twophoton can be produced. Ofwhat wavelength are of these photons?

    Found on Page 555

  4. To show that the Klein-Gordon equation has valid solutions for negative values of E, verify that equation (12-4) is satisfied by a wave function of the form .ψ(x,t)=Ae±ipx/ℏ±iEt/ℏ

    Found on Page 555

  5. To show,

    Found on Page 556

  6. For solutions of Klein-Gordon equation, the quantity,

    Found on Page 556

  7. In non-relavistic quantum mechanics, governed by the Schrodinger equation, the probability of finding a particle does not change with time.

    Found on Page 556

  8. The electron mentioned in Section 12.3 for deep inelastic scattering experiments is20GeV , and the momentum is given as .20 GeV/c Why so simple a conversion?

    Found on Page 556

  9. Approximately what energy would electrons need to have to be useful as probes that could reveal features as small as 10-18m,the approximate range of the weak force?

    Found on Page 556

  10. Suppose a force between two particles decreases distance according to F=k/rb. What is the limit on b if the energy required to separate the particlesInfinitely far is not to be infinite?

    Found on Page 556

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