True/False Indicate whether the
statement is true or false.


1.

The integer value “n” in the equation for energy of vibration can
have any value.


2.

The emission of electrons from a metallic surface depends on the intensity of
the incident radiation.


3.

Atoms emit radiation only when their vibrational energy changes.

Multiple Choice Identify the
choice that best completes the statement or answers the question.


4.

The energy of a photon is inversely proportional to its _____
a.  intensity  c.  wavelength  b.  frequency  d.  all of the
above 


5.

Which function correctly expresses how to determine the energy of a
photon?
a.  E = heV  c.  E = hf  b.  E = hn  d.  E = hv 


6.

The Compton effect supports
a.  both models of light.  c.  neither particle nor wave model of light.  b.  the wave model of
light.  d.  the particle model
of light. 


7.

In the photoelectric effect, light displays properties that are like a
_____.
a.  neither a wave nor a particle  c.  wave  b.  particle  d.  both a wave and a particle 


8.

The de Broglie equation shows that subatomic particles have properties
that
a.  are particlelike.  b.  are wavelike.  c.  have properties of
both waves and particles.  d.  have properties of
atoms. 


9.

The energy of a photon is:
a.  inversely proportional to its wavelength  c.  directly proportional to its
wavelength  b.  not related to wavelength  d.  identical to its wavelength 


10.

Which phenomenon demonstrates the particle nature of light?
a.  Interference  c.  Diffraction  b.  Photoelectric effect  d.  Refraction 


11.

Electromagnetic waves have properties that are _____.
a.  particlelike  c.  neither a nor b  b.  wavelike  d.  both a and b 


12.

Which principle states that it is impossible to measure precisely both the
position and momentum of a particle at the same time?
a.  Avogadro’s principle  c.  Pauli exclusion
principle  b.  Aufbau principle  d.  Heisenberg uncertainty principle 


13.

A device which causes a door to automatically open is an example of light
displaying properties that are _____.
a.  both a particle and a wave  c.  neither a particle or a
wave  b.  particlelike  d.  wavelike 


14.

When electromagnetic radiation above the threshold frequency falls on an object,
it emits electrons:
a.  after a small time delay  b.  without any time delay  c.  after a very large
time delay  d.  with a variable time delay 

Completion Complete each
statement.


15.

The following equation is used to solve for the ____________________ p =
hf/c


16.

In the de Broglie wavelength equation, a moving particle’s wavelength is
equal to ____________________ divided by the particle’s momentum.


17.

The ____________________ of a particle is expressed in the following equation:
p=h/l.

Matching



Match the following term with the description a.  Compton effect  d.  photon  b.  de Broglie wavelength  e.  emission spectrum  c.  Heisenberg
uncertainty principle  f.  quanta 


18.

the idea that the precise location and momentum of a particle cannot be
measured simultaneously


19.

quotient of Planck’s constant and momentum


20.

the effect of the loss of energy of scattered photons


21.

light emitted over a range of frequencies


22.

a quanta of light energy


23.

discrete “bundles”

Short Answer


24.

Describe how the photoelectric effect produces energy for a home using solar
panels.


25.

Describe what effect is used in solar panels to produce energy for a
home.


26.

Write the equation to solve for the de Broglie wavelength.


27.

Why is it impossible to measure precisely both the position and momentum of a
particle at the same time?


28.

The kinetic energy of the electrons when radiation of a certain wavelength falls
on metal A is 1.900 eV. When the same radiation falls on metal B, the kinetic energy of the electrons
is 2.700 eV. If the threshold wavelength of metal A is 140.0 nm, find the threshold wavelength of
metal B.


29.

What equation is used to determine the energy of vibration?


30.

Describe what it means to say “energy is quantized.”


31.

Would the wavelength for a 1.5 kg object traveling at 20 m/s be visible?


32.

Two cannon balls are fired. The first cannon ball has a mass of 8.80 kg and a
velocity of 95.0 m/s. The second cannon ball has a mass of 7.00 kg and a velocity of 1.50 ´ 10^{2} m/s. Find the de Broglie wavelengths for both the
balls.


33.

Describe two circumstances in which light behaves as a particle.


34.

Name a familiar example in which light displays particlelike properties.


35.

What is the constant used to substitute for hc in the equation, E = hc/l?

Problem


36.

What is the velocity of an electron whose kinetic energy is 1.98 eV?
