What is the de Broglie wavelength of an electron with the kinetic energy of 120 eV?
 

(1) 0.123 nm

(2) 0.121 nm

(3) 0.112 nm

(4) 0.131 nm

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For what kinetic energy of a neutron will the associated de Broglie wavelength be
1.40 x 10-10 m?

1 1.1×10-2 eV2 2.1×10-2 eV3 3.3×10-2 eV4 4.2×10-2 eV

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What is the de Broglie wavelength of a nitrogen molecule in air at 300 K? Assume that the molecule is moving with the root-mean-square speed of molecules at this temperature. (Atomic mass of nitrogen = 14.0076 u)

(1) 0.028 nm

(2) 0.031 nm

(3) 0.127 nm

(4) 0.0139 nm

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What is the de Broglie wavelength of a bullet of mass 0.040 kg traveling at the speed of 1.0 km/s?

1 1.65×10-35 m2 1.05×10-35 m3 2.15×10-35 m4 2.11×10-35 m 

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 An electron and a photon each have a wavelength of 1.00 nm. The momentum of the electron will be:

(1) Greater than photon.

(2) Equal to the photon.

(3) Less than photon.

(4) None of these.
 

Subtopic:  De-broglie Wavelength |
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An electron microscope uses electrons accelerated by a voltage of 50 kV. The de Broglie wavelength associated with the electrons is:

1  6.7×10-12 m2 5.4×10-12 m3  8.5×10-12 m4  4.4×10-12 m

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The typical de Broglie wavelength associated with a He atom in helium gas at room temperature 27 °C and 1 atm pressure will be:

1 4.63×10-11 m2 6.2×10-12 m3 7.3×10-11 m4 5.7×10-12 m

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The typical de Broglie wavelength of an electron in metal at 27 °C will be:

1 4.4×10-10 m2 3.4×10-9 m3 1.3×10-10 m4 6.2×10-9 m

Subtopic:  De-broglie Wavelength |
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