Question 1

The first observation of electron diffraction was done by

Accepted Answer

A)  J. J. Thompson. 
B)  Louis de Broglie. 
C)  Neils Bohr. 
D)  Einstein and Planck. 
E)  Davisson and Germer. 
A)  J. J. Thompson. 
B)  Louis de Broglie. 
C)  Neils Bohr. 
D)  Einstein and Planck. 
E)  Davisson and Germer.

Question 2

The more precisely the position of a particle is known,

Accepted Answer

A)  the more precisely its momentum can be known. 
B)  the more precisely its energy can be known. 
C)  the less precisely its momentum can be known. 
D)  the shorter its deBroglie wavelength is. 
A)  the more precisely its momentum can be known. 
B)  the more precisely its energy can be known. 
C)  the less precisely its momentum can be known. 
D)  the shorter its deBroglie wavelength is.

Question 3

A particle in a box with zero point energy E1 = 4.0 eV,undergoes a transition from the third excited state to the second excited state emitting a photon.What is the energy of the photon?

Accepted Answer

A)  4.0 eV 
B)  16 eV 
C)  20 eV 
D)  28 eV 
E)  26 eV 
A)  4.0 eV 
B)  16 eV 
C)  20 eV 
D)  28 eV 
E)  26 eV

Question 4

Which one of the following is true?

Accepted Answer

A)  The principal quantum number of the electron in a hydrogen atom does not affect its energy. 
B)  The orbital angular momentum quantum number of an electron state is always less than the principal quantum number. 
C)  The electron spin quantum number can take on any one of four different values. 
D)  The principal quantum number of an electron in its ground state is zero. 
A)  The principal quantum number of the electron in a hydrogen atom does not affect its energy. 
B)  The orbital angular momentum quantum number of an electron state is always less than the principal quantum number. 
C)  The electron spin quantum number can take on any one of four different values. 
D)  The principal quantum number of an electron in its ground state is zero.

Question 5

The statistical interpretation associated with the wave function originated with

Accepted Answer

A)  Born. 
B)  Bohr. 
C)  Einstein. 
D)  Schrödinger. 
E)  Planck. 
A)  Born. 
B)  Bohr. 
C)  Einstein. 
D)  Schrödinger. 
E)  Planck.

Question 6

If the ground state configuration of an atom is 1s22s22p4,what is the atomic number of the atom?

Accepted Answer

A)  14 
B)  10 
C)  8 
D)  4 
E)  3 
A)  14 
B)  10 
C)  8 
D)  4 
E)  3

Question 7

How do the energy level spacings for a particle in a box change when the box is made longer?

Accepted Answer

A)  The spacings do not change. 
B)  The spacings increase. 
C)  The spacings decrease. 
D)  There is insufficient information to answer this question. 
A)  The spacings do not change. 
B)  The spacings increase. 
C)  The spacings decrease. 
D)  There is insufficient information to answer this question.

Question 8

Excited atomic states that last for a relatively long time are called

Accepted Answer

A)  laser states. 
B)  metastable states. 
C)  amplification states. 
D)  radiation states. 
E)  cascading states. 
A)  laser states. 
B)  metastable states. 
C)  amplification states. 
D)  radiation states. 
E)  cascading states.

Question 9

What letter stands for an orbital with orbital quantum number 5?

Accepted Answer

A)  h 
B)  g 
C)  f 
D)  d 
E)  p 
A)  h 
B)  g 
C)  f 
D)  d 
E)  p

Question 10

Alkali metals have how many electrons past the noble gas configuration?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
E)  5 
A)  1 
B)  2 
C)  3 
D)  4 
E)  5

Question 11

Each element in a column of the periodic table

Accepted Answer

A)  has the same size. 
B)  has the same nuclear properties. 
C)  has the same electron configuration. 
D)  has the same nuclear charge. 
A)  has the same size. 
B)  has the same nuclear properties. 
C)  has the same electron configuration. 
D)  has the same nuclear charge.

Question 12

The ratio of the de Broglie wavelength of the electron in the n = 4 orbit in hydrogen to the wavelength in the n = 1 orbit is

Accepted Answer

A)  1. 
B)  2. 
C)  4. 
D)  16. 
E)  0.25. 
A)  1. 
B)  2. 
C)  4. 
D)  16. 
E)  0.25.

Question 13

The fundamental equation of quantum mechanics is known as the ________ equation.

Accepted Answer

A)  Heisenberg 
B)  Bohr 
C)  Born 
D)  Schrödinger 
E)  de Broglie 
A)  Heisenberg 
B)  Bohr 
C)  Born 
D)  Schrödinger 
E)  de Broglie

Question 14

Optical pumping of a ruby laser is done with photons absorbed at energy 2.25 eV.The laser light consists of photons of energy 1.79 eV in a transition that goes to ground.What is the energy of the transition from the pumped stated to the lasing state?

Accepted Answer

A)  2.25 eV 
B)  1.79 eV 
C)  4.04 eV 
D)  0.460 eV 
E)  1.30 eV 
A)  2.25 eV 
B)  1.79 eV 
C)  4.04 eV 
D)  0.460 eV 
E)  1.30 eV

Question 15

For a particle in a 1-dimensional box,what happens to the zero-point energy if the width of the box is halved?

Accepted Answer

A)  nothing,it remains at zero 
B)  it doubles 
C)  it halves 
D)  it quadruples 
E)  it quarters 
A)  nothing,it remains at zero 
B)  it doubles 
C)  it halves 
D)  it quadruples 
E)  it quarters

Question 16

For the first excited state (n = 2) of the particle in a box of width L,what is the uncertainty in momentum?

Accepted Answer

A)  $\pi$$\ddot{A}$$\S$ / 2 
B)  3$\pi$$\ddot{A}$$\S$ / 2 
C)  $\ddot{A}$$\S$ 
D)  $\pi$$\ddot{A}$$\S$ 
A)  $\pi$$\ddot{A}$$\S$ / 2 
B)  3$\pi$$\ddot{A}$$\S$ / 2 
C)  $\ddot{A}$$\S$ 
D)  $\pi$$\ddot{A}$$\S$

Question 17

What is the wavelength of an electron with energy 1.60 $\times$ 10-15 J?

Accepted Answer

A)  61.2 nm 
B)  612 nm 
C)  1.20 fm 
D)  13.7 pm 
E)  12.3 pm 
A)  61.2 nm 
B)  612 nm 
C)  1.20 fm 
D)  13.7 pm 
E)  12.3 pm

Question 18

In the He-Ne laser,the lasing transition goes from the 20.66 eV state in Ne to a lower state.The wavelength of the laser photons is 633.0 nm.What is the lower state of the lasing transition?

Accepted Answer

A)  the He ground state 
B)  the Ne ground state 
C)  the 20.61 eV excited stated of He 
D)  the 18.70 eV excited state of Ne 
E)  the 4.660 eV excited state of Ne 
A)  the He ground state 
B)  the Ne ground state 
C)  the 20.61 eV excited stated of He 
D)  the 18.70 eV excited state of Ne 
E)  the 4.660 eV excited state of Ne

Question 19

What is the wavelength of a neutron with kinetic energy 44.0 keV?

Accepted Answer

A)  56.4 pm 
B)  0.137 pm 
C)  0.166 pm 
D)  2.83 pm 
E)  5.11 pm 
A)  56.4 pm 
B)  0.137 pm 
C)  0.166 pm 
D)  2.83 pm 
E)  5.11 pm

Question 20

What is the full multiplicity of the n = 3 level of the H atom?

Accepted Answer

A)  18 
B)  30 
C)  16 
D)  32 
E)  9 
A)  18 
B)  30 
C)  16 
D)  32 
E)  9

Exam 28: Quantum Physics

The first observation of electron diffraction was done by

The more precisely the position of a particle is known,

A particle in a box with zero point energy E1 = 4.0 eV,undergoes a transition from the third excited state to the second excited state emitting a photon.What is the energy of the photon?

Which one of the following is true?

The statistical interpretation associated with the wave function originated with

If the ground state configuration of an atom is 1s22s22p4,what is the atomic number of the atom?

How do the energy level spacings for a particle in a box change when the box is made longer?

Excited atomic states that last for a relatively long time are called

What letter stands for an orbital with orbital quantum number 5?

Alkali metals have how many electrons past the noble gas configuration?

Each element in a column of the periodic table

The ratio of the de Broglie wavelength of the electron in the n = 4 orbit in hydrogen to the wavelength in the n = 1 orbit is

The fundamental equation of quantum mechanics is known as the ________ equation.

Optical pumping of a ruby laser is done with photons absorbed at energy 2.25 eV.The laser light consists of photons of energy 1.79 eV in a transition that goes to ground.What is the energy of the transition from the pumped stated to the lasing state?

For a particle in a 1-dimensional box,what happens to the zero-point energy if the width of the box is halved?

For the first excited state (n = 2) of the particle in a box of width L,what is the uncertainty in momentum?

What is the wavelength of an electron with energy 1.60 ×\times× 10-15 J?

In the He-Ne laser,the lasing transition goes from the 20.66 eV state in Ne to a lower state.The wavelength of the laser photons is 633.0 nm.What is the lower state of the lasing transition?

What is the wavelength of a neutron with kinetic energy 44.0 keV?

What is the full multiplicity of the n = 3 level of the H atom?

Introduction

Force

Acceleration and Newtons Second Law of Motion

Motion With Constant Acceleration

Circular Motion

Conservation of Energy

Linear Momentum

Torque and Angular Momentum

Fluids

Elasticity and Oscillations

Waves

Sound

Temperature and the Ideal Gas

Heat

Thermodynamics

Electric Forces and Fields

Electric Potential

Electric Current and Circuits

Magnetic Forces and Fields

Electromagnetic Induction

Alternating Current

Electromagnetic Waves

Reflection and Refraction of Light

Optical Instruments

Interference and Diffraction

Relativity

Early Quantum Physics and the Photon

Nuclear Physics

Particle Physics

Filters

A particle in a box with zero point energy E₁ = 4.0 eV,undergoes a transition from the third excited state to the second excited state emitting a photon.What is the energy of the photon?

If the ground state configuration of an atom is 1s²2s²2p⁴,what is the atomic number of the atom?

What is the wavelength of an electron with energy 1.60 $\times$ 10^-15 J?