Calculate the energy in eV of a neutron (mass 1.675 10-27 kg) that has de Broglie wavelength
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Question:
Calculate the energy in eV of a neutron (mass 1.675 10-27 kg) that has de Broglie wavelength of 7.2 10-12 m
(Note: h = 6.626 10-34 J ? s, c = 3.00 108 m/s, and e = 1.602 10-19 C.)(Note: h = 6.626 10-34 J ? s, c = 3.00 108 m/s, and e = 1.602 10-19 C.)
small dust particle m = 8.50 10-6 g is being observed under a magnifying lens. Its position is determined to be within 0.0060 mm.(a)Find the velocity limit implied by the uncertainty of its position.
(b)Assuming the dust particle is moving at this speed, how many years would it take for the particle to move 1 mm?
Recall that the energy levels of the hydrogen atom are given by
En = , where R = 1.097 10-1 m.
What wavelength photon is emitted when the atom undergoes a transition from the n = 4 to the n = 6 level?
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