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An electron initially at rest is accelerated through a potential difference. It is then brought to rest
1 in a collision, and all of its kinetic energy is converted into a single photon of electromagnetic
radiation. Which one of the following quantities is not required to find a value for the wavelength
of the photon?
A The mass of the electron
B The charge on the electron
C The velocity of electromagnetic waves
D The value of the potential difference
(Total 1 mark)
The diagram shows some energy levels of an atom.
2
The transition E3 to E1 corresponds to the emission of visible light.
A transition corresponding to the emission of infrared radiation could be
A E1 to E0
B E4 to E1
C E1 to E2
D E3 to E2
(Total 1 mark)
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The diagram gives some of the energy levels of a hydrogen atom.
3
The transition of an excited hydrogen atom from E3 to E1 causes a photon of visible light to be
emitted.
Which transition causes a photon of ultraviolet light to be emitted?
A E4 to E3
B E3 to E2
C E2 to E1
D E1 to E0
(Total 1 mark)
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The diagram shows some of the energy levels for a hydrogen atom.
4
___________________________
0
___________________________
first excited state –5.4 × 10-19 J
___________________________
ground state –21.8 × 10-19 J
A free electron of kinetic energy 20.0 × 10–19 J collides with a hydrogen atom in its ground state.
The hydrogen atom is excited from its ground state to the first excited state. The kinetic energy of
the free electron after the collision is
A 1.8 × 10–19 J
B 3.6 × 10–19 J
C 5.4 × 10–19 J
D 16.4 × 10–19 J
(Total 1 mark)
The diagram drawn to scale shows some of the energy levels of an atom. Transition P results in
5
the emission of a photon of wavelength 4 × 10–7 m.
Which one of the transitions A, B, C, or D could result in the emission of a photon of wavelength
8 × 10–7 m?
(Total 1 mark)
(a) State what happens in an atom when line spectra are produced.
6
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........................................................................................................................
........................................................................................................................
........................................................................................................................
(2)
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An electron initially at rest is accelerated through a potential difference. It is then brought to rest
1 in a collision, and all of its kinetic energy is converted into a single photon of electromagnetic
radiation. Which one of the following quantities is not required to find a value for the wavelength
of the photon?
A The mass of the electron
B The charge on the electron
C The velocity of electromagnetic waves
D The value of the potential difference
(Total 1 mark)
The diagram shows some energy levels of an atom.
2
The transition E3 to E1 corresponds to the emission of visible light.
A transition corresponding to the emission of infrared radiation could be
A E1 to E0
B E4 to E1
C E1 to E2
D E3 to E2
(Total 1 mark)
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, theonlinephysicstutor.com
The diagram gives some of the energy levels of a hydrogen atom.
3
The transition of an excited hydrogen atom from E3 to E1 causes a photon of visible light to be
emitted.
Which transition causes a photon of ultraviolet light to be emitted?
A E4 to E3
B E3 to E2
C E2 to E1
D E1 to E0
(Total 1 mark)
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, theonlinephysicstutor.com
The diagram shows some of the energy levels for a hydrogen atom.
4
___________________________
0
___________________________
first excited state –5.4 × 10-19 J
___________________________
ground state –21.8 × 10-19 J
A free electron of kinetic energy 20.0 × 10–19 J collides with a hydrogen atom in its ground state.
The hydrogen atom is excited from its ground state to the first excited state. The kinetic energy of
the free electron after the collision is
A 1.8 × 10–19 J
B 3.6 × 10–19 J
C 5.4 × 10–19 J
D 16.4 × 10–19 J
(Total 1 mark)
The diagram drawn to scale shows some of the energy levels of an atom. Transition P results in
5
the emission of a photon of wavelength 4 × 10–7 m.
Which one of the transitions A, B, C, or D could result in the emission of a photon of wavelength
8 × 10–7 m?
(Total 1 mark)
(a) State what happens in an atom when line spectra are produced.
6
........................................................................................................................
........................................................................................................................
........................................................................................................................
........................................................................................................................
(2)
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