Question 1

Which of these is not a medical application of lasers?

Accepted Answer

A)  Removal of skin cancer 
B)  Reshaping of the cornea 
C)  Cutting of vision-impairing tissues in cataract patients 
D)  Removal of tumors using fiber optics 
E)  Detection of pregnancy 
A)  Removal of skin cancer 
B)  Reshaping of the cornea 
C)  Cutting of vision-impairing tissues in cataract patients 
D)  Removal of tumors using fiber optics 
E)  Detection of pregnancy

Question 2

The speed of light is 3.0 x 108 _____.

Accepted Answer

A)  meters per second 
B)  miles per hour 
C)  kilometers per second 
D)  kilometers per hour 
E)  centimeters per second 
A)  meters per second 
B)  miles per hour 
C)  kilometers per second 
D)  kilometers per hour 
E)  centimeters per second

Question 3

The processes by which an excited electron returns to its ground state with the emission of energy is known as ____.

Accepted Answer

A)  photodecomposition 
B)  electronic relaxation 
C)  spectroscopy 
D)  electronic degradation 
E)  microwave radiation 
A)  photodecomposition 
B)  electronic relaxation 
C)  spectroscopy 
D)  electronic degradation 
E)  microwave radiation

Question 4

Which of these is not a characteristic of light?

Accepted Answer

A)  Wavelength 
B)  Frequency 
C)  Energy 
D)  Amplitude 
E)  Mass 
A)  Wavelength 
B)  Frequency 
C)  Energy 
D)  Amplitude 
E)  Mass

Question 5

Which of the following statements is true of a laser cavity?

Accepted Answer

A)  A laser cavity consists of four mirrors. 
B)  All the mirrors in a laser cavity are fully reflective mirrors. 
C)  In a laser cavity, the first photon hits one of the mirrors and bounces back to pass through the lasting medium again. 
D)  A chain reaction produces a large number of photons that circulate outside a laser cavity. 
E)  In a laser cavity, the wavelength of the first photon is different from the wavelengths of the other photons. 
A)  A laser cavity consists of four mirrors. 
B)  All the mirrors in a laser cavity are fully reflective mirrors. 
C)  In a laser cavity, the first photon hits one of the mirrors and bounces back to pass through the lasting medium again. 
D)  A chain reaction produces a large number of photons that circulate outside a laser cavity. 
E)  In a laser cavity, the wavelength of the first photon is different from the wavelengths of the other photons.

Question 6

Wavelength of light is _____.

Accepted Answer

A)  proportional to  its  frequency and energy 
B)  inversely proportional to its  frequency and energy 
C)  proportional to  its  frequency and inversely proportional to its  energy 
D)  inversely proportional to its  frequency and proportional to its  energy 
E)  independent of its frequency and energy 
A)  proportional to  its  frequency and energy 
B)  inversely proportional to its  frequency and energy 
C)  proportional to  its  frequency and inversely proportional to its  energy 
D)  inversely proportional to its  frequency and proportional to its  energy 
E)  independent of its frequency and energy

Question 7

Which of these is not a form of spectroscopy?

Accepted Answer

A)  NMR 
B)  MRI 
C)  photochemistry 
D)  phosphorescence 
E)  fluorescence 
A)  NMR 
B)  MRI 
C)  photochemistry 
D)  phosphorescence 
E)  fluorescence

Question 8

When excited, a particular element emits yellow light with wavelength 589 nm. Identify the element.

Accepted Answer

A)  Hydrogen 
B)  Sodium 
C)  Lithium 
D)  Helium 
E)  Mercury 
A)  Hydrogen 
B)  Sodium 
C)  Lithium 
D)  Helium 
E)  Mercury

Question 9

The lasting medium in a solid-state laser is usually a(n) _____ distributed in a solid crystal.

Accepted Answer

A)  gas 
B)  excited electron 
C)  nonmetal ion 
D)  metal ion 
E)  liquid 
A)  gas 
B)  excited electron 
C)  nonmetal ion 
D)  metal ion 
E)  liquid

Question 10

Which of these processes could occur during electronic relaxation?
I. Photodecomposition
II. Fluorescence
III. Emission of heat

Accepted Answer

A)  I only 
B)  I and II 
C)  II and III 
D)  I and III 
E)  I, II, and III 
A)  I only 
B)  I and II 
C)  II and III 
D)  I and III 
E)  I, II, and III

Question 11

The key to obtaining an image, like in MRI, as opposed to a graph, like in NMR, is to create a(n) _____.

Accepted Answer

A)  high resonance frequency 
B)  low resonance frequency 
C)  internal magnetic field that remains constant in space 
D)  external magnetic field that varies in space 
E)  electrical current 
A)  high resonance frequency 
B)  low resonance frequency 
C)  internal magnetic field that remains constant in space 
D)  external magnetic field that varies in space 
E)  electrical current

Question 12

Arrange these spectral regions in order of increasing energy  (Infrared, Microwaves, Ultraviolet, Visible).

Accepted Answer

A)  Microwaves < Infrared < Visible < Ultraviolet 
B)  Microwaves < Visible < Infrared < Ultraviolet 
C)  Ultraviolet < Infrared < Visible < Microwaves 
D)  Ultraviolet < Visible < Infrared < Microwaves 
E)  Infrared < Microwaves < Ultraviolet < Visible 
A)  Microwaves < Infrared < Visible < Ultraviolet 
B)  Microwaves < Visible < Infrared < Ultraviolet 
C)  Ultraviolet < Infrared < Visible < Microwaves 
D)  Ultraviolet < Visible < Infrared < Microwaves 
E)  Infrared < Microwaves < Ultraviolet < Visible

Question 13

What is the frequency of light emitted by a helium-neon laser if the wavelength of the light is 632.8 nm and the speed of light is 3 × 10  8  m/s?

Accepted Answer

A)  4.74 × 1014 s − 1 
B)  4.74 × 105 s − 1 
C)  1.58 × 10 − 3 s − 1 
D)  2.11 × 10 − 15 s − 1 
E)  1.58 × 10 − 15 s − 1 
A)  4.74 × 1014 s − 1 
B)  4.74 × 105 s − 1 
C)  1.58 × 10 − 3 s − 1 
D)  2.11 × 10 − 15 s − 1 
E)  1.58 × 10 − 15 s − 1

Question 14

Tiny packets of energy that travel at the speed of light are known as _____.

Accepted Answer

A)  photons 
B)  X-rays 
C)  carotenes 
D)  chlorophylls 
E)  gamma rays 
A)  photons 
B)  X-rays 
C)  carotenes 
D)  chlorophylls 
E)  gamma rays

Question 15

The interaction of matter and light is known as _____.

Accepted Answer

A)  photodecomposition 
B)  phosphorescence 
C)  fluorescence 
D)  spectroscopy 
E)  photochemistry 
A)  photodecomposition 
B)  phosphorescence 
C)  fluorescence 
D)  spectroscopy 
E)  photochemistry

Question 16

Which of these statements is/are  true ?
I. As wavelength increases, frequency decreases.
II. As energy increases, frequency decreases.
III. As wavelength increases, energy decreases.
IV. The product of wavelength and frequency is constant.

Accepted Answer

A)  I, III, and IV 
B)  I and II 
C)  I, II, and IV 
D)  III and IV 
E)  II, III, and IV 
A)  I, III, and IV 
B)  I and II 
C)  I, II, and IV 
D)  III and IV 
E)  II, III, and IV

Question 17

If the molecules of an object absorb all light, the object appears _____.

Accepted Answer

A)  white 
B)  blue 
C)  black 
D)  yellow 
E)  red 
A)  white 
B)  blue 
C)  black 
D)  yellow 
E)  red

Question 18

Which of these processes is/are responsible for the breaking of bonds within a molecule?
I. Photodecomposition
II. Fluorescence
III. Emission of heat

Accepted Answer

A)  I only 
B)  I and II 
C)  II and III 
D)  I and III 
E)  I, II, and III 
A)  I only 
B)  I and II 
C)  II and III 
D)  I and III 
E)  I, II, and III

Question 19

Which of these colors of visible light has the shortest wavelength?

Accepted Answer

A)  Red 
B)  Green 
C)  Yellow 
D)  Blue 
E)  Violet 
A)  Red 
B)  Green 
C)  Yellow 
D)  Blue 
E)  Violet

Question 20

Which of these statements best describes the difference between traditional spectroscopy and NMR?

Accepted Answer

A)  Spectroscopy requires that the sample be in a magnetic field. 
B)  NMR utilizes high energy electromagnetic radiation , whereas  spectroscopy does not. 
C)  NMR utilizes the transitions of hydrogen nuclei , whereas  spectroscopy utilizes the transitions of electrons. 
D)  NMR and spectroscopy are essentially the same. 
E)  Both B and C are correct. 
A)  Spectroscopy requires that the sample be in a magnetic field. 
B)  NMR utilizes high energy electromagnetic radiation , whereas  spectroscopy does not. 
C)  NMR utilizes the transitions of hydrogen nuclei , whereas  spectroscopy utilizes the transitions of electrons. 
D)  NMR and spectroscopy are essentially the same. 
E)  Both B and C are correct.

Which of these is not a medical application of lasers?

The speed of light is 3.0 x 10⁸ _____.

The processes by which an excited electron returns to its ground state with the emission of energy is known as ____.

Which of these is not a characteristic of light?

Which of the following statements is true of a laser cavity?

Wavelength of light is _____.

Which of these is not a form of spectroscopy?

When excited, a particular element emits yellow light with wavelength 589 nm. Identify the element.

The lasting medium in a solid-state laser is usually a(n) _____ distributed in a solid crystal.

Which of these processes could occur during electronic relaxation? I. Photodecomposition II. Fluorescence III. Emission of heat

The key to obtaining an image, like in MRI, as opposed to a graph, like in NMR, is to create a(n) _____.

Arrange these spectral regions in order of increasing energy (Infrared, Microwaves, Ultraviolet, Visible).

What is the frequency of light emitted by a helium-neon laser if the wavelength of the light is 632.8 nm and the speed of light is 3 × 10 ⁸ m/s?

Tiny packets of energy that travel at the speed of light are known as _____.

The interaction of matter and light is known as _____.

Which of these statements is/are true ? I. As wavelength increases, frequency decreases. II. As energy increases, frequency decreases. III. As wavelength increases, energy decreases. IV. The product of wavelength and frequency is constant.

If the molecules of an object absorb all light, the object appears _____.

Which of these processes is/are responsible for the breaking of bonds within a molecule? I. Photodecomposition II. Fluorescence III. Emission of heat

Which of these colors of visible light has the shortest wavelength?

Which of these statements best describes the difference between traditional spectroscopy and NMR?

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Exam 7: Light and Color

Which of these is not a medical application of lasers?

The speed of light is 3.0 x 108 _____.

The processes by which an excited electron returns to its ground state with the emission of energy is known as ____.

Which of these is not a characteristic of light?

Which of the following statements is true of a laser cavity?

Wavelength of light is _____.

Which of these is not a form of spectroscopy?

When excited, a particular element emits yellow light with wavelength 589 nm. Identify the element.

The lasting medium in a solid-state laser is usually a(n) _____ distributed in a solid crystal.

Which of these processes could occur during electronic relaxation? I. Photodecomposition II. Fluorescence III. Emission of heat

The key to obtaining an image, like in MRI, as opposed to a graph, like in NMR, is to create a(n) _____.

Arrange these spectral regions in order of increasing energy (Infrared, Microwaves, Ultraviolet, Visible).

What is the frequency of light emitted by a helium-neon laser if the wavelength of the light is 632.8 nm and the speed of light is 3 × 10 8 m/s?

Tiny packets of energy that travel at the speed of light are known as _____.

The interaction of matter and light is known as _____.

Which of these statements is/are true ? I. As wavelength increases, frequency decreases. II. As energy increases, frequency decreases. III. As wavelength increases, energy decreases. IV. The product of wavelength and frequency is constant.

If the molecules of an object absorb all light, the object appears _____.

Which of these processes is/are responsible for the breaking of bonds within a molecule? I. Photodecomposition II. Fluorescence III. Emission of heat

Which of these colors of visible light has the shortest wavelength?

Which of these statements best describes the difference between traditional spectroscopy and NMR?

Molecular Reasons

The Chemists Toolbox

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Molecules, Compounds, and Chemical Reactions

Chemical Bonding

Organic Chemistry

Nuclear Chemistry

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The Liquids and Solids Around Us: Especially Water

Acids and Bases: the Molecules Responsible for Sour and Bitter

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The Chemistry of Food

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The speed of light is 3.0 x 10⁸ _____.

What is the frequency of light emitted by a helium-neon laser if the wavelength of the light is 632.8 nm and the speed of light is 3 × 10 ⁸ m/s?