College Physics
2nd Edition
ISBN: 9780134601823
Author: ETKINA, Eugenia, Planinšič, G. (gorazd), Van Heuvelen, Alan
Publisher: Pearson,
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Question
Chapter 28, Problem 10MCQ
To determine
The meaning of wave-particle duality from the provided choices:
a. Waves and particles have the same properties.
b. Particles are simultaneously waves.
c. The behavior of elementary particles can be described simultaneously using physical quantities that describe the behavior of waves and particles.
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Which of the following describes one of the main features of wave-particle duality?
a. As speed increases, the wave nature of matter becomes more evident.
b. As momentum decreases, the particle nature of matter becomes more evident.
c. As energy increases, the wave nature of matter becomes easier to observe.
d. As mass increases, the wave nature of matter is less easy to observe.
According to the idea of wave-particle duality, which of the following items has a wavelength? Choose all that apply.
a. An electron moving at 2.80 m/s.
b. A planet moving at 180,000 km/hr.
c. A gas molecule moving at 515 m/s.
d. A person running at 10 mi/hr.
Chapter 28 Solutions
College Physics
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- Insulators (nonmetals) have a higher BE than metals, and it is more difficult for photons to eject electrons from insulators. Discuss how this relates to the free charges in metals that make them good conductors.arrow_forwardUnreasonable Results Red light having a wavelength of 700 nm is projected onto magnesium metal to which electrons are bound by 3.68 eV. (a) Use KEe=hfBE to calculate the kinetic energy of the ejected electrons. (b) What is unreasonable about this result? (c) Which assumptions are unreasonable or inconsistent?arrow_forwardWhat two pieces of evidence allowed the first calculation of me, the mass of the electron? (a) The ratios qe/me and qp/mp. (b) The values of qe and EB. (c) The ratio qe/me and qe. Justify your response.arrow_forward
- Models are particularly useful in relativity and quantum mechanics, where conditions are outside those normally encountered by humans. What is a model?arrow_forwardAn X-ray tube accelerates an electron with an applied voltage of 50 kV toward a metal target, (a) What is the shortest-wavelength X-ray radiation generated at the target? (b) Calculate the photon energy in eV. (c) Explain the relationship of the photon energy to the applied voltage.arrow_forward(a) The lifetime of a highly unstable nucleus is 10-20. What is the smallest uncertainty in its decay energy? (b) Compare this with the rest energy of an electron.arrow_forward
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- What is the difference between a free particle and particle in a box wave equation? A. The free particle has an infinite wave function. B. The particle in a box has a definite wave function. C. The particle in a box is having some potential to consider D. No difference.arrow_forward200 5 Wave Packets 6 The Heisenberg Uncertainty Principle 11. Approximately what range of frequencies must be superimposed to create this wave packet? 12. A telecommunication system uses pulses with a duration of 5 ns. a. About how many such pulses can be transmitted per second? b. What is the minimum bandwidth needed to transmit these pulses? 13. Wave packets are shown for particles 1, 2, and 3. MA ^^^^^ M. Particle 1 AMA Particle 2 $(1) Which particle can have its velocity known most precisely? Explain. 1 ps Hollo Aff Particle 3arrow_forwardWhich idea was proposed by Werner Heisenberg?a. Certain metals emit electrons when illuminated by light with low enough wavelength.b. Light waves passing through a diffraction parting produce a diffraction pattern.c. Light waves have particle properties, and particles of matter have wave-like properties.d. Photons used to determine the location of electrons have no measurable effect on electrons.e. Simultaneously determining the exact momentum and exact position of an electron is impossible.arrow_forward
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