De Broglie Wave Quiz: Physics Test!

6 Questions | Total Attempts: 1571

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De Broglie Wave Quiz: Physics Test!

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Questions and Answers
  • 1. 
    Complete the following statement: According to the de Broglie relation, the wavelength of a "matter" wave is inversely proportional to
    • A. 

      Planck's constant.

    • B. 

      The mass of the particle.

    • C. 

      The momentum of the particle.

    • D. 

      The frequency of the wave.

    • E. 

      The speed of the particle.

  • 2. 
    What is the de Broglie wavelength of an electron (m = 9.11 ´ 10-31 kg) in a 5.0 ´ 103-volt X-ray tube?
    • A. 

      0.007 nm

    • B. 

      0.014 nm

    • C. 

      0.017 nm

    • D. 

      0.028 nm

    • E. 

      0.034 nm

  • 3. 
    Determine the de Broglie wavelength of a neutron (m = 1.67 ´ 10-27 kg) which has a speed of 5.0 m/s.
    • A. 

      79 nm

    • B. 

      162 nm

    • C. 

      395 nm

    • D. 

      529 nm

    • E. 

      1975 nm

  • 4. 
    The de Broglie wavelength of an electron (m = 9.11 ´ 10-31 kg) is 1.2 ´ 10-10 m. Determine the kinetic energy of the electron.
    • A. 

      1.5 x 10^-15 J

    • B. 

      1.6 x 10^-16 J

    • C. 

      1.7 x 10^-17 J

    • D. 

      1.8 x 10^-18 J

    • E. 

      1.9 x 10^-19 J

  • 5. 
    What happens to the de Broglie wavelength of an electron if its momentum is doubled?
    • A. 

      The wavelength decreases by a factor of 4.

    • B. 

      The wavelength increases by a factor of 4.

    • C. 

      The wavelength increases by a factor of 3.

    • D. 

      The wavelength increases by a factor of 2.

    • E. 

      The wavelength decreases by a factor of 2.

  • 6. 
    The Hubble Space Telescope has an orbital speed of 7.56 ´ 103 m/s and a mass of 11,600 kg. What is the de Broglie wavelength of the telescope?
    • A. 

      8.77 x 10^7 m

    • B. 

      5.81 x 10^-26 m

    • C. 

      6.63 x 10^-34 m

    • D. 

      3.78 x 10^-40 m

    • E. 

      7.56 x 10^-42 m

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