The existence of the atomic nucleus was discovered in 1911 by Ernest Rutherford, who properly interpreted some experiments in which a beam of alpha particles was scattered from a metal foil of atoms such as gold. (a) If the alpha particles had a kinetic energy of 7.5 MeV, what was their de Broglie wavelength? (b) Explain whether the wave nature of the incident alpha particles should have been taken into account in interpreting these experiments. The mass of an alpha particle is 4.00 u (atomic mass units), and its distance of closest approach to the nuclear center in these experiments was about 30 fm. (The wave nature of matter was not postulated until more than a decade after these crucial experiments were first performed.)
Compton effect
The incoming photons' energy must be in the range of an X-ray frequency to generate the Compton effect. The electron does not lose enough energy that reduces the wavelength of scattered photons towards the visible spectrum. As a result, with visible lights, the Compton effect is missing.
Recoil Velocity
The amount of backward thrust or force experienced by a person when he/she shoots a gun in the forward direction is called recoil velocity. This phenomenon always follows the law of conservation of linear momentum.
The existence of the atomic nucleus was discovered in
1911 by Ernest Rutherford, who properly interpreted some experiments
in which a beam of alpha particles was scattered from
a metal foil of atoms such as gold. (a) If the alpha particles had a
kinetic energy of 7.5 MeV, what was their de Broglie wavelength?
(b) Explain whether the wave nature of the incident alpha
particles should have been taken into account in interpreting
these experiments. The mass of an alpha particle is 4.00 u
(
nuclear center in these experiments was about 30 fm. (The wave
nature of matter was not postulated until more than a decade after
these crucial experiments were first performed.)
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