Question 1

A laser cannot emit more energy than is put into it. But in instances where stored energy can be released in a very short time, the laser

Accepted Answer

A) puts out more energy than is put into it. 
B) has a greater power output than power input. 
C) both of these 
D) neither of these 
A) puts out more energy than is put into it. 
B) has a greater power output than power input. 
C) both of these 
D) neither of these

Question 2

The hottest star is the one that glows

Accepted Answer

A) red. 
B) white. 
C) blue. 
D) need more information 
A) red. 
B) white. 
C) blue. 
D) need more information

Question 3

The greater proportion of energy immediately converted to heat rather than light occurs in

Accepted Answer

A) a fluorescent lamp. 
B) an incandescent lamp. 
C) both of these 
D) neither of these 
A) a fluorescent lamp. 
B) an incandescent lamp. 
C) both of these 
D) neither of these

Question 4

In the process of fluorescence, the input is high-frequency light and the output is

Accepted Answer

A) higher-frequency light. 
B) equally high-frequency light. 
C) lower-frequency light. 
D) none of the above 
A) higher-frequency light. 
B) equally high-frequency light. 
C) lower-frequency light. 
D) none of the above

Question 5

The energy of a photon depends on its

Accepted Answer

A) speed. 
B) frequency. 
C) amplitude. 
D) all of the above 
E) none of the above 
A) speed. 
B) frequency. 
C) amplitude. 
D) all of the above 
E) none of the above

Question 6

Isolated bells ring clearly, while bells crammed in a box have a muffled ring. This is analogous to light emitted by

Accepted Answer

A) a laser. 
B) a fluorescent lamp. 
C) an incandescent lamp. 
D) a phosphorescent source. 
E) none of the above 
A) a laser. 
B) a fluorescent lamp. 
C) an incandescent lamp. 
D) a phosphorescent source. 
E) none of the above

Question 7

If light in a spectroscope were passed through a star-shaped opening instead of a thin slit, spectral lines would appear as

Accepted Answer

A) lines of poorer resolution. 
B) stars. 
C) blobs of no definite shape. 
A) lines of poorer resolution. 
B) stars. 
C) blobs of no definite shape.

Question 8

Which of these lamps employs semi-conductor technology?

Accepted Answer

A) incandescent lamp 
B) fluorescent lamp 
C) CFL 
D) LED 
A) incandescent lamp 
B) fluorescent lamp 
C) CFL 
D) LED

Question 9

When we say energy levels in an atom are discrete, we mean that their energy levels are well defined and

Accepted Answer

A) separate from one another. 
B) separated by equal energy increments. 
C) continuous. 
D) private. 
A) separate from one another. 
B) separated by equal energy increments. 
C) continuous. 
D) private.

Question 10

The lamp most similar to the common fluorescent lamp is the

Accepted Answer

A) LED. 
B) CFL. 
C) incandescent lamp. 
D) none of the above 
A) LED. 
B) CFL. 
C) incandescent lamp. 
D) none of the above

Question 11

To keep chickens in a chicken coop warm, the kind of lamp to use is

Accepted Answer

A) fluorescent. 
B) CFL. 
C) incandescent. 
D) LED. 
E) all about the same 
A) fluorescent. 
B) CFL. 
C) incandescent. 
D) LED. 
E) all about the same

Question 12

A paint pigment that absorbs red light and gives off blue light

Accepted Answer

A) is fluorescent. 
B) is phosphorescent. 
C) is used in lasers. 
D) is polarized. 
E) doesn't exist. 
A) is fluorescent. 
B) is phosphorescent. 
C) is used in lasers. 
D) is polarized. 
E) doesn't exist.

Question 13

Electrons with greater potential energies relative to the atomic nucleus are

Accepted Answer

A) inner electrons. 
B) outer electrons. 
C) both the same 
A) inner electrons. 
B) outer electrons. 
C) both the same

Question 14

A helium-neon laser beam in a vacuum is

Accepted Answer

A) red. 
B) orange. 
C) white. 
D) invisible. 
E) none of the above 
A) red. 
B) orange. 
C) white. 
D) invisible. 
E) none of the above

Question 15

A throbbing pulse of electromagnetic radiation is called a

Accepted Answer

A) proton. 
B) photon. 
C) phototron. 
D) newtron. 
E) nooytron. 
A) proton. 
B) photon. 
C) phototron. 
D) newtron. 
E) nooytron.

Question 16

Which color of visible light carries the most energy per photon?

Accepted Answer

A) red 
B) green 
C) blue 
D) violet 
E) all the same 
A) red 
B) green 
C) blue 
D) violet 
E) all the same

Question 17

Green light emitted by excited mercury vapor corresponds to an energy transition in the mercury atom. A more energetic transition might emit

Accepted Answer

A) red light. 
B) blue light. 
C) white light. 
D) any of these 
A) red light. 
B) blue light. 
C) white light. 
D) any of these

Question 18

Compared to the energy of a photon of red light, the energy of a photon of blue light is

Accepted Answer

A) less. 
B) more. 
C) the same. 
A) less. 
B) more. 
C) the same.

Question 19

An atom that emits light of a certain frequency is

Accepted Answer

A) not likely to absorb that same frequency. 
B) an absorber of light of the same frequency. 
C) fluorescent. 
D) none of the above 
A) not likely to absorb that same frequency. 
B) an absorber of light of the same frequency. 
C) fluorescent. 
D) none of the above

Question 20

Light is emitted when an electron

Accepted Answer

A) is boosted to a higher energy level. 
B) makes a transition to a lower energy level. 
C) accelerates to a medium energy level. 
D) none of the above 
A) is boosted to a higher energy level. 
B) makes a transition to a lower energy level. 
C) accelerates to a medium energy level. 
D) none of the above

Exam 30: Light Emission

A laser cannot emit more energy than is put into it. But in instances where stored energy can be released in a very short time, the laser

The hottest star is the one that glows

The greater proportion of energy immediately converted to heat rather than light occurs in

In the process of fluorescence, the input is high-frequency light and the output is

The energy of a photon depends on its

Isolated bells ring clearly, while bells crammed in a box have a muffled ring. This is analogous to light emitted by

If light in a spectroscope were passed through a star-shaped opening instead of a thin slit, spectral lines would appear as

Which of these lamps employs semi-conductor technology?

When we say energy levels in an atom are discrete, we mean that their energy levels are well defined and

The lamp most similar to the common fluorescent lamp is the

To keep chickens in a chicken coop warm, the kind of lamp to use is

A paint pigment that absorbs red light and gives off blue light

Electrons with greater potential energies relative to the atomic nucleus are

A helium-neon laser beam in a vacuum is

A throbbing pulse of electromagnetic radiation is called a

Which color of visible light carries the most energy per photon?

Green light emitted by excited mercury vapor corresponds to an energy transition in the mercury atom. A more energetic transition might emit

Compared to the energy of a photon of red light, the energy of a photon of blue light is

An atom that emits light of a certain frequency is

Light is emitted when an electron

About Science

Newtons First Law of Motion: Inertia

Linear Motion

Newtons Second Law of Motion

Newtons Third Law of Motion: Action and Reaction

Momentum

Energy

Rotational Motion

Gravity

Projectile and Satellite Motion

Atomic Nature of Matter

Solids

Liquids

Gases and Plasmas

Temperature, Heat, and Expansion

Heat Transfer

Change of Phase

Thermodynamics

Vibrations and Waves

Sound

Musical Sounds

Electrostatics

Electric Current

Magnetism

Electromagnetic Induction

Properties of Light

Color

Reflection and Refraction

Light Waves

Light Quanta

The Atom and the Quantum

Atomic Nucleus and Radioactivity

Nuclear Fission and Fusion

Special Theory of Relativity

General Theory of Relativity

Systems of Measurement

Filters