University Physics with Modern Physics (14th Edition)
University Physics with Modern Physics (14th Edition)
14th Edition
ISBN: 9780321973610
Author: Hugh D. Young, Roger A. Freedman
Publisher: PEARSON
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Chapter 38, Problem 38.45PP
To determine

Which option will generate higher-energy photons in this linear accelerator.

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(a.) In a cathode ray tube the electrons are accelerated through a PD of 500V and then pass between deflecting plates which are 0.05m long.(i.) Calculate the time it takes an electron to pass between the plates. (ii.) If the PD across the plates is 10V DC and the plates are 1cm apart, calculate the angle through which the electrons are deflected.(iii.) Explain why the deflection produced by an alternating voltage, applied to the deflecting plates, can be zero at some high frequency.
Galactic cosmic rays (GCRs) in the 100 MeV-1.00 GeV energy range pose the greatest radiation danger to astronauts in Earth orbit or on future interplanetary missions. As we shall find in the chapter on nuclear physics, fast-moving protons are 10 times as effective in causing radiation damage as x-rays of the same energy. Approximately 85% of GCRS are fast-moving protons, and spacecraft traveling in interplanetary space would require thick shielding to attenuate not only the incident cosmic rays, but also the shower of secondary particles created when the cosmic ray particles impacted the shielding material. (a) What is the speed (in terms of c) of a 1.00 GeV cosmic ray proton? The rest mass of the proton is 938 MeV. The phrase "a 1.00 GeV cosmic ray proton" means that the kinetic energy of the proton is 1.00 GeV. As we contemplate space travel at relativistic speeds, we must consider the low-density abundance of atomic hydrogen in the interstellar medium (ISM), estimated to be…
Provide the answers in 90 minutes, and count as 2 questions if needed.

Chapter 38 Solutions

University Physics with Modern Physics (14th Edition)

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