Question 1

A carbon dioxide laser emits photons of 10.6 $\mu$m wavelength.How many photons per second are emitted by a 10.0 kW CO2 laser?

Accepted Answer

A)  4.27 $\times$ 1021 
B)  5.39 $\times$ 1030 
C)  3.17 $\times$ 1018 
D)  5.34 $\times$ 1023 
E)  6.20 $\times$ 1023 
A)  4.27 $\times$ 1021 
B)  5.39 $\times$ 1030 
C)  3.17 $\times$ 1018 
D)  5.34 $\times$ 1023 
E)  6.20 $\times$ 1023

Question 2

A bullet is fired from a rifle.The end of the barrel is a circular aperture.Is diffraction a measurable effect?

Accepted Answer

A)  yes 
B)  no,because the de Broglie wavelength of the bullet is too large relative to the aperture 
C)  yes,because the aperture may be a slit or circular aperture 
D)  no,because the de Broglie wavelength of the bullet is too small relative to the aperture 
A)  yes 
B)  no,because the de Broglie wavelength of the bullet is too large relative to the aperture 
C)  yes,because the aperture may be a slit or circular aperture 
D)  no,because the de Broglie wavelength of the bullet is too small relative to the aperture

Question 3

A situation known as "population inversion" is needed for lasing action.What does "population inversion" mean?

Accepted Answer

A)  Electrons are in the -1/2 state. 
B)  Excited atoms must be at the top of the laser tube. 
C)  Excited atoms must be at the bottom of the laser tube. 
D)  The number of excited states that are to emit photons are in greater number than the lower states at which the transition is ending. 
E)  The number of lower states are in greater number than the upper states participating in the lasing action. 
A)  Electrons are in the -1/2 state. 
B)  Excited atoms must be at the top of the laser tube. 
C)  Excited atoms must be at the bottom of the laser tube. 
D)  The number of excited states that are to emit photons are in greater number than the lower states at which the transition is ending. 
E)  The number of lower states are in greater number than the upper states participating in the lasing action.

Question 4

How many different spin orientations can an electron have in a given orbital?

Accepted Answer

A)  2 
B)  1 
C)  Any number 
D)  4 
A)  2 
B)  1 
C)  Any number 
D)  4

Question 5

What is the wavelength of an electron in the n = 2 state of the hydrogen atom?

Accepted Answer

A)  5.20 $\times$ 10-11 m 
B)  1.66 $\times$ 10-10 m 
C)  3.32 $\times$ 10-10 m 
D)  6.65 $\times$ 10-10 m 
E)  1.33 $\times$ 10-9 m 
A)  5.20 $\times$ 10-11 m 
B)  1.66 $\times$ 10-10 m 
C)  3.32 $\times$ 10-10 m 
D)  6.65 $\times$ 10-10 m 
E)  1.33 $\times$ 10-9 m

Question 6

If a string of length L,fixed at both ends,is made to resonate at its lowest possible frequency,what is the wavelength associated with that resonance?

Accepted Answer

A)  L 
B)  2L 
C)  L/2 
D)  0.707L 
E)  1.414L 
A)  L 
B)  2L 
C)  L/2 
D)  0.707L 
E)  1.414L

Question 7

In lasers,YAG stands for

Accepted Answer

A)  yellow argon gold. 
B)  yearly age group. 
C)  yttrium assisted gain. 
D)  yttrium aluminum garnet. 
E)  yttrium antimony gain. 
A)  yellow argon gold. 
B)  yearly age group. 
C)  yttrium assisted gain. 
D)  yttrium aluminum garnet. 
E)  yttrium antimony gain.

Question 8

How are the circumference,C,of the ground-state orbit of the electron in hydrogen and the de Broglie wavelength , $\lambda$ , related?

Accepted Answer

A)  $\lambda$ = C 
B)  $\pi$$\lambda$ = C 
C)  2$\pi$$\lambda$ = C 
D)  $\lambda$ = $\pi$C 
E)  $\lambda$ = 2$\pi$C 
A)  $\lambda$ = C 
B)  $\pi$$\lambda$ = C 
C)  2$\pi$$\lambda$ = C 
D)  $\lambda$ = $\pi$C 
E)  $\lambda$ = 2$\pi$C

Question 9

The uncertainty in the position of a proton is 250 pm.What is the minimum velocity of the proton when its position has been measured to this precision?

Accepted Answer

A)  0.29c 
B)  0.10c 
C)  0.39c 
D)  0.21c 
A)  0.29c 
B)  0.10c 
C)  0.39c 
D)  0.21c

Question 10

Which of the following experiments demonstrate the particle properties of light?

Accepted Answer

A)  diffraction 
B)  interference 
C)  photoelectric effect 
D)  refraction 
A)  diffraction 
B)  interference 
C)  photoelectric effect 
D)  refraction

Question 11

As the principal quantum number of the Hydrogen atom increases,what does the spacing between adjacent energy levels do?

Accepted Answer

A)  Decreases 
B)  Increases 
C)  Stays the same 
A)  Decreases 
B)  Increases 
C)  Stays the same

Question 12

The uncertainty in the position of a proton is 250 pm.What is the minimum kinetic energy of the proton when its position has been measured to this precision?

Accepted Answer

A)  41 MeV 
B)  83 MeV 
C)  21 MeV 
D)  5.2 MeV 
A)  41 MeV 
B)  83 MeV 
C)  21 MeV 
D)  5.2 MeV

Question 13

Quantum mechanics tells us that the probability of finding the electron in hydrogen at a distance between r and r + $\Delta$r in the ground state is greatest at a distance _____ a0,where a0 is the Bohr radius.

Accepted Answer

A)  0.707 
B)  1.00 
C)  1.41 
D)  2.00 
E)  3.001/2 
A)  0.707 
B)  1.00 
C)  1.41 
D)  2.00 
E)  3.001/2

Question 14

A beam of neutrons (m = 939.6 MeV/c2) of momentum 12 keV is passed through a single slit of width 0.10 nm.As a result of this,the neutron beam acquires an uncertainty in the component of the momentum that is transverse to the beam direction.If the distance between the slit and a projection screen onto which the neutrons are projected is 1.5 m,what is the expected width of the neutron distribution on the projection screen in the transverse direction?

Accepted Answer

A)  155 cm 
B)  12 cm 
C)  25 cm 
D)  50 cm 
A)  155 cm 
B)  12 cm 
C)  25 cm 
D)  50 cm

Question 15

Which of these statements about electron energy levels in hydrogen atoms is true?

Accepted Answer

A)  An electron with a positive total energy is a bound electron. 
B)  The orbital angular momentum of an electron in the ground state is zero. 
C)  An electron in the hydrogen atom is best represented as a traveling wave. 
D)  An electron in state n can make transitions only to the state n + 1 or n - 1. 
A)  An electron with a positive total energy is a bound electron. 
B)  The orbital angular momentum of an electron in the ground state is zero. 
C)  An electron in the hydrogen atom is best represented as a traveling wave. 
D)  An electron in state n can make transitions only to the state n + 1 or n - 1.

Question 16

For an orbital angular momentum quantum number of 4,what is the magnitude of the orbital angular momentum?

Accepted Answer

A)  4 h 
B)  3 h 
C)  $ \sqrt{6}$ h 
D) $ \sqrt{12}$ h 
E)  $ \sqrt{20}$ h 
A)  4 h 
B)  3 h 
C)  $ \sqrt{6}$ h 
D) $ \sqrt{12}$ h 
E)  $ \sqrt{20}$ h

Question 17

Except for helium,the outer subshell of a noble gas has what electron configuration?

Accepted Answer

A)  s2p4 
B)  s2p6 
C)  d2s2 
D)  d6p2 
E)  s1p4 
A)  s2p4 
B)  s2p6 
C)  d2s2 
D)  d6p2 
E)  s1p4

Question 18

The configuration 1s22s22p63s23p1 is for what element?

Accepted Answer

A)  B 
B)  F 
C)  Ne 
D)  Al 
E)  Cr 
A)  B 
B)  F 
C)  Ne 
D)  Al 
E)  Cr

Question 19

If light of wavelength 600 nm is used to locate an electron to one wavelength of the light,what is the maximum uncertainty in the electron's momentum?

Accepted Answer

A)  1.1 $\times$ 10-27 kg·m/s 
B)  1.8 $\times$ 10-28 kg·m/s 
C)  8.8 $\times$ 10-29 kg·m/s 
D)  1.2 $\times$ 10-32 kg·m/s 
E)  1.8 $\times$ 10-32 kg·m/s 
A)  1.1 $\times$ 10-27 kg·m/s 
B)  1.8 $\times$ 10-28 kg·m/s 
C)  8.8 $\times$ 10-29 kg·m/s 
D)  1.2 $\times$ 10-32 kg·m/s 
E)  1.8 $\times$ 10-32 kg·m/s

Question 20

If a particle in a box has a ground-state energy of 10.0 eV,what is the energy of the 4th excited state?

Accepted Answer

A)  20.0 eV 
B)  40.0 eV 
C)  160 eV 
D)  50.0 eV 
E)  250 eV 
A)  20.0 eV 
B)  40.0 eV 
C)  160 eV 
D)  50.0 eV 
E)  250 eV

Exam 28: Quantum Physics

A carbon dioxide laser emits photons of 10.6 μ\muμ m wavelength.How many photons per second are emitted by a 10.0 kW CO2 laser?

A bullet is fired from a rifle.The end of the barrel is a circular aperture.Is diffraction a measurable effect?

A situation known as "population inversion" is needed for lasing action.What does "population inversion" mean?

How many different spin orientations can an electron have in a given orbital?

What is the wavelength of an electron in the n = 2 state of the hydrogen atom?

If a string of length L,fixed at both ends,is made to resonate at its lowest possible frequency,what is the wavelength associated with that resonance?

In lasers,YAG stands for

How are the circumference,C,of the ground-state orbit of the electron in hydrogen and the de Broglie wavelength , λ\lambdaλ , related?

The uncertainty in the position of a proton is 250 pm.What is the minimum velocity of the proton when its position has been measured to this precision?

Which of the following experiments demonstrate the particle properties of light?

As the principal quantum number of the Hydrogen atom increases,what does the spacing between adjacent energy levels do?

The uncertainty in the position of a proton is 250 pm.What is the minimum kinetic energy of the proton when its position has been measured to this precision?

Quantum mechanics tells us that the probability of finding the electron in hydrogen at a distance between r and r + Δ\DeltaΔ r in the ground state is greatest at a distance _____ a0,where a0 is the Bohr radius.

Which of these statements about electron energy levels in hydrogen atoms is true?

For an orbital angular momentum quantum number of 4,what is the magnitude of the orbital angular momentum?

Except for helium,the outer subshell of a noble gas has what electron configuration?

The configuration 1s22s22p63s23p1 is for what element?

If light of wavelength 600 nm is used to locate an electron to one wavelength of the light,what is the maximum uncertainty in the electron's momentum?

If a particle in a box has a ground-state energy of 10.0 eV,what is the energy of the 4th excited state?

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 carbon dioxide laser emits photons of 10.6 $\mu$ m wavelength.How many photons per second are emitted by a 10.0 kW CO₂ laser?

How are the circumference,C,of the ground-state orbit of the electron in hydrogen and the de Broglie wavelength , $\lambda$ , related?

Quantum mechanics tells us that the probability of finding the electron in hydrogen at a distance between r and r + $\Delta$ r in the ground state is greatest at a distance _____ a₀,where a₀ is the Bohr radius.

The configuration 1s²2s²2p⁶3s²3p¹ is for what element?

If a particle in a box has a ground-state energy of 10.0 eV,what is the energy of the 4^th excited state?