1. Which of the following can be thought of as either a wave or a particle?
(a) Light.
(b) An electron.
(c) A proton.
(d) All of the above.
2. When you throw a baseball, its de Broglie wavelength is
(a) The same size as the ball.
(b) About the same size as an atom.
(c) About the same size as an atom's nucleus.
(d) Much smaller than the size of an atom's nucleus.
3. Electrons and photons of light are similar in that
(a) Both have momentum given by h/λ.
(b) Both exhibit wave-particle duality.
(c) Both are used in diffraction experiments to explore structure.
(d) All of the above.
(e) None of the above.