SAT Quantum & Nuclear, Relativity

page 1

 

1. A photon emitted from the nucleus of an atom contains energy. The ratio of the photon energy to the frequency is
  • A. the speed of light
  • B. the speed of light squared
  • C. Planck's constant
  • D. the photon wavelength
  • E. the photon momentum

2. Photons can exhibit wave and particle properties. In which of these experiments are these properties evident?

  Wave properties Particle properties
A Double slit interference Diffraction
B The photoelectric effect Double slit interference
C Diffraction Double slit interference
D The photoelectric effect Diffraction
E Double slit interference The photoelectric effect
3. In the photoelectric effect, light is incident on a clean metal plate and electrons are lost from the surface of the metal. The minimum amount of energy required to liberate a single electron is equal to
  • A. the photon energy
  • B. the work function of the metal
  • C. the kinetic energy of the electron
  • D. the stopping potential applied
  • E. the photon wavelength

4. Which of the following graphs correctly shows the variation of kinetic energy of the emitted electrons with frequency of applied radiation?

5. A clean sodium metal is tested under a lamp, but no photoelectrons are emitted. To produce photoelectrons, what changes should take place?
  • A. The metal should be replaced with a metal of higher work function
  • B. A higher frequency light source should be used
  • C. The lamp should be replaced with an identical one of higher power output
  • D. A coherent light source should be used
  • E. A longer wavelength light source should be used

 

6. Electrons orbit the nucleus at specific energy levels, or shells. An electron falling from a high energy level to a lower level will have

  • A. absorbed a photon
  • B. absorbed a neutrino
  • C. emitted a photon
  • D. emitted an electron
  • E. emitted a neutrino

 

7. The diagram shows electron energy levels within a hydrogen atom. Of the 5 possible transitions listed below, the transition that will give rise to an emission spectral line of the shortest wavelength is

  • A. from n=1 to n=2
  • B. from n=2 to n=3
  • C. from n=3 to n=2
  • D. from n=3 to n=1
  • E. from n=2 to n=1

 

 

http://www.lightandmatter.com

 

8. Which of these word equations summarises beta decay?

  • A. neutronproton + beta particle + neutrino
  • B. protonneutron + beta particle + neutrino
  • C. neutronproton + beta particle + antineutrino
  • D. protonneutron + beta particle + antineutrino + photon
  • E. neutronproton + beta particle + neutrino + photon

 

9. When Uranium decays it emits an alpha particle, forming an isotope of Thorium. Which of the following decay equations is correct?

A.
238
U
232
Th
+
2
α
92
90
2
B.
238
U
236
Th
+
2
α
92
90
2
C.
238
U
234
Th
+
4
α
92
90
2
D.
238
U
232
Th
+
4
α
92
90
2
E.
238
U
236
Th
+
2
α
92
88
4

 

10. The graph below shows the decay of a sample of radioactive isotope.

Which of the following gives the half life and the activity remaining after 10 days?

 
  Half Life (days) Activity after 10 days (kBq)
A. 2 0
B. 4 0
C. 2 2.5
D. 4 5
E. 4 2.5