WorksheetsWave particle duality
Total questions: 10
Worksheet time: 20mins
Electrons with a certain kinetic energy pass through a powdered crystalline sample and are incident on a fluorescent screen. The diagram shows a sketch of the diffraction pattern produced. A change is made and this second pattern is produced. Which change could produce the second pattern?
decreasing the kinetic energy of the electrons
replacing the electrons with protons with the same kinetic energy
using a crystalline sample with a wider spacing between its atoms
moving the screen closer to the crystalline sample
Which row gives evidence for the wave nature of electrons and evidence for the particulate nature of light?
A
B
C
D
Which particle has the smallest de Broglie wavelength?
an electron moving at 4 × 103 m s−1
a proton moving at 4 × 103 m s−1
an electron moving at 8 × 105 m s−1
a proton moving at 8 × 105 m s−1
A muon and an electron are travelling at the same speed. Which row gives the particle with the greater kinetic energy and the particle with the longer de Broglie wavelength?
A
B
C
D
A particle has a kinetic energy of Ek and a de Broglie wavelength of λ. What is the de Broglie wavelength when the particle has a kinetic energy of 4Ek?
A
B
C
D
Which graph shows the variation of momentum p with wavelength λ of a photon?
A
B
C
D
Evidence of the wave-like properties of electrons is
the emission of electrons when short-wavelength light falls on a metal surface.
the movement of electrons in an electric current.
the diffraction of electrons by a metal crystal.
the annihilation of an electron with a positron.
A photon of ultraviolet radiation has a frequency of 1.5 × 1015 Hz. What is the momentum of the photon?
3.3 × 10–41 kg m s–1
1.3 × 10–40 kg m s–1
3.3 × 10–27 kg m s–1
1.3 × 10–26 kg m s–1
A particle of mass m has a kinetic energy of E. What is the de Broglie wavelength of this particle?
A
B
C
D
Which row links both the photoelectric effect and electron diffraction to the properties of waves and particles?
A
B
C
D
