Quiz8 The Wave Nature of Particles

Quiz8 The Wave Nature of Particles - Exam Name_ MULTIPLE...

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Exam Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) An electron has the same de Broglie wavelength as an 810 - nm photon. The speed of the electron is closest to: A) 720 m/s B) 900 m/s C) 990 m/s D) 800m/s E) 260 m/s 1) 2) A proton has a speed of 2.3 × 10 4 m/s. The energy of a photon that has the same de Broglie wavelength as the proton is closest to: A) 49 keV B) 120 keV C) 72 keV D) 140 keV E) 95 keV 2) 3) An electron has the same de Broglie wavelength as a 1.3 - eV photon. The speed of the electron is closest to: A) 660 m/s B) 600 m/s C) 710 m/s D) 760 m/s E) 550 m/s 3) 4) An electron has a kinetic energy of 5.4 eV. The energy of a photon that has the same de Broglie wavelength as the electron is closest to: A) 2.5 keV B) 2.3 keV C) 2.7 keV D) 2.2 keV E) 2.0 keV 4) 5) The neutrons in a beam have energies ranging from 0.04 eV to 0.14 eV. The beam is incident normally on the surface of a crystal. The neutrons diffract from surface planes of the crystal whose spacing is 189 pm. The range of angles from the normal, at which maximum intensity of diffracted neutrons occurs, is closest to: A) 19° to 49° B) 15° to 51° C) 19° to 51° D) 24° to 51° E) 24° to 49° 5) 6) The neutrons in a beam have energies ranging from 0.02 eV to 0.17 eV. The beam is incident normally on the surface of a crystal. The neutrons diffract from surface planes of the crystal whose spacing is 287 pm. Neutrons diffracted at an angle of 22° from the normal are allowed to pass through slits to form a new beam. The energy of the neutrons in this new beam is closest to: A) 0.061 eV B) 0.052 eV C) 0.071 eV D) 0.044 eV E) 0.037 eV 6) 7) A 350 - eV electron beam is directed normally at the surface of a crystal. The Frst order intensity maximum of diffracted electrons occurs at an angle of 17° from the normal. The spacing of the surface planes of the crystal is closest to: A) 150 pm B) 220 pm C) 200 pm D) 180 pm E) 130 pm 7) 8) A 630 - eV electron beam is directed normally at the surface of a crystal. The Frst - order intensity maximum of diffracted electrons occurs at an angle of 12° from the normal. The angle from the normal of the second - order intensity maximum is closest to: A) 19° B) 27° C) 23° D) 21° E) 25° 8) 1
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9) The spacing of the surface planes of a crystal is 287 pm. A beam directed normally at the surface of the crystal undergoes Frst - order diffraction at an angle of 18° from the normal. The diffraction is done with a beam of monochromatic x - rays. The energy of the photons is closest to: A) 17 keV B) 15 keV C) 16 keV D) 13 keV E) 14 keV 9) 10) The spacing of the surface planes of a crystal is 233 pm. A beam directed normally at the surface of the crystal undergoes Frst - order diffraction at an angle of 61° from the normal. The diffraction is done with a beam of monoenergetic electrons. The energy of the electrons is closest to: A) 31 eV B) 22 eV C) 41 eV D) 36
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This note was uploaded on 12/13/2011 for the course PHYS 2C PHYS 2C taught by Professor Groisman during the Spring '11 term at UCSD.

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Quiz8 The Wave Nature of Particles - Exam Name_ MULTIPLE...

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