Question 1

Everything looks red through a red filter because

Accepted Answer

A)  the filter emits red light and absorbs other colors.
B)  the filter absorbs red light and emits other colors.
C)  the filter transmits red light and absorbs other colors.
D)  the filter reflects red light and transmits other colors.

Question 2

Process of Science: The theory of thermal radiation says that hot objects are bluer than cool objects.Does it depend on what the object is made of? How can you test this?

Accepted Answer

The color of thermal radiation from an o...

Question 3

State the two laws of thermal radiation.

Accepted Answer

1.Hotter objects emit more rad...

Question 4

Lines of a particular element appear at the same wavelength in both emission and absorption line spectra.

Accepted Answer

A) True 
 B)False

Question 5

Which of the following statements about X-rays and radio waves is not true?

Accepted Answer

A)  X-rays have shorter wavelengths than radio waves.
B)  X-rays and radio waves are both forms of light,or electromagnetic radiation.
C)  X-rays have higher frequency than radio waves.
D)  X-rays have higher energy than radio waves.
E)  X-rays travel through space faster than radio waves.

Question 6

The following questions refer to the diagram below.The levels represent energy levels in a hydrogen atom.Each level is labeled with its energy (above the ground state of Level 1)in units of electron/volts (eV).The labeled transitions represent an electron moving between energy levels.
 
-Which transition represents an electron that absorbs a photon with 10.2 eV of energy?

Accepted Answer

The answer of The following questions refer to the diagram...

Question 7

When light reflects off an object,what is the relation between the angle of incidence and the angle of reflection?

Accepted Answer

A)  angle of incidence = angle of reflection
B)  angle of incidence + angle of reflection = 90°
C)  angle of incidence + angle of reflection = 180°
D)  angle of incidence - angle of reflection = 90°
E)  It depends on the material that the light reflects off.

Question 8

If a material is transparent,then it

Accepted Answer

A)  reflects light well.
B)  absorbs light well.
C)  transmits light well.
D)  scatters light well.
E)  emits light well.

Question 9

Dissociation is the process in which

Accepted Answer

A)  the bonds between atoms in a molecule are broken.
B)  a molecule goes from the solid phase to the gas phase.
C)  the bonds between electrons around an atomic nucleus are broken.
D)  an element changes into another form.
E)  an electron is shared between atomic nuclei.

Question 10

Thermal radiation is defined as

Accepted Answer

A)  radiation produced by a hot object.
B)  radiation in the infrared part of the spectrum.
C)  radiation that depends only on the emitting object's temperature.
D)  radiation in the form of emission lines from an object.
E)  radiation that is felt as heat.

Question 11

Any object moving relative to Earth will have a Doppler shift.

Accepted Answer

A) True 
 B)False

Question 12

You observe the same spectral line in two stars that are identical in every way except that one rotates faster than the other.How does the spectral line differ between the two?

Accepted Answer

A)  There is no difference.
B)  The line in the faster rotating star is blueshifted.
C)  The line in the faster rotating star is redshifted.
D)  The line in the faster rotating star is broader.
E)  The line in the faster rotating star is narrower.

Question 13

Define atomic weight (or atomic mass).

Accepted Answer

Atomic weight is the...

Question 14

Which of the following objects is not a close approximation of a thermal emitter?

Accepted Answer

A)  hot,thin gas
B)  a star
C)  a filament in a light bulb
D)  you
E)  a planet

Question 15

Emission lines from different ionization states of the same element appear in the same place in the spectrum.

Accepted Answer

A) True 
 B)False

Question 16

Which of the following statements about electrons is not true?

Accepted Answer

A)  Electrons orbit the nucleus rather like planets orbiting the Sun.
B)  Within an atom,an electron can have only particular energies.
C)  Electrons can jump between energy levels in an atom only if they receive or give up an amount of energy equal to the difference in energy between the energy levels.
D)  An electron has a negative electrical charge.
E)  Electrons have very little mass compared to protons or neutrons.

Question 17

If a material is highly opaque,then it

Accepted Answer

A)  reflects most light.
B)  absorbs most light.
C)  transmits most light.
D)  scatters most light.
E)  emits most light.

Question 18

Consider an atom of oxygen in which the nucleus contains 8 protons and 8 neutrons.If it is doubly ionized,what is the charge of the oxygen ion and how many electrons remain in the ion?

Accepted Answer

A)  Charge = +2;number of remaining electrons = 8.
B)  Charge = -2;number of remaining electrons = 10.
C)  Charge = +2;number of remaining electrons = 6.
D)  Charge = +2;number of remaining electrons = 2.

Question 19

When white light passes through a cool cloud of gas,we see

Accepted Answer

A)  visible light.
B)  infrared light.
C)  thermal radiation.
D)  an absorption line spectrum.
E)  an emission line spectrum.

Question 20

When an atom loses an electron,it becomes

Accepted Answer

A)  vaporized.
B)  dissociated.
C)  ionized.
D)  an isotope.
E)  a plasma.

Exam 5: Light and Matter: Reading Messages from the Cosmos

Everything looks red through a red filter because

Correct Answer
verified

Dissociation is the process in which

Correct Answer
verified

When white light passes through a cool cloud of gas,we see

Correct Answer
verified

When light reflects off an object,what is the relation between the angle of incidence and the angle of reflection?

Correct Answer
verified

You observe the same spectral line in two stars that are identical in every way except that one rotates faster than the other.How does the spectral line differ between the two?

Correct Answer
verified

Which of the following statements about electrons is not true?

Correct Answer
verified

Lines of a particular element appear at the same wavelength in both emission and absorption line spectra.

Correct Answer
verified

Consider an atom of oxygen in which the nucleus contains 8 protons and 8 neutrons.If it is doubly ionized,what is the charge of the oxygen ion and how many electrons remain in the ion?

Correct Answer
verified

Correct Answer
verified

Which of the following statements about X-rays and radio waves is not true?

Correct Answer
verified

If a material is highly opaque,then it

Correct Answer
verified

When an atom loses an electron,it becomes

Correct Answer
verified

Any object moving relative to Earth will have a Doppler shift.

Correct Answer
verified

State the two laws of thermal radiation.

Correct Answer
verified
1.Hotter objects emit more rad...
View Answer

Define atomic weight (or atomic mass).

Correct Answer
verified
Atomic weight is the...
View Answer

Which of the following objects is not a close approximation of a thermal emitter?

Correct Answer
verified

Emission lines from different ionization states of the same element appear in the same place in the spectrum.

Correct Answer
verified

Thermal radiation is defined as

Correct Answer
verified

Process of Science: The theory of thermal radiation says that hot objects are bluer than cool objects.Does it depend on what the object is made of? How can you test this?

Correct Answer
verified
The color of thermal radiation from an o...
View Answer

If a material is transparent,then it

Correct Answer
verified

Exam 5: Light and Matter: Reading Messages from the Cosmos

Everything looks red through a red filter because

Correct AnswerverifiedShow Answer

Dissociation is the process in which

Correct AnswerverifiedShow Answer

When white light passes through a cool cloud of gas,we see

Correct AnswerverifiedShow Answer

When light reflects off an object,what is the relation between the angle of incidence and the angle of reflection?

Correct AnswerverifiedShow Answer

You observe the same spectral line in two stars that are identical in every way except that one rotates faster than the other.How does the spectral line differ between the two?

Correct AnswerverifiedShow Answer

Which of the following statements about electrons is not true?

Correct AnswerverifiedShow Answer

Lines of a particular element appear at the same wavelength in both emission and absorption line spectra.

Correct AnswerverifiedShow Answer

Consider an atom of oxygen in which the nucleus contains 8 protons and 8 neutrons.If it is doubly ionized,what is the charge of the oxygen ion and how many electrons remain in the ion?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which of the following statements about X-rays and radio waves is not true?

Correct AnswerverifiedShow Answer

If a material is highly opaque,then it

Correct AnswerverifiedShow Answer

When an atom loses an electron,it becomes

Correct AnswerverifiedShow Answer

Any object moving relative to Earth will have a Doppler shift.

Correct AnswerverifiedShow Answer

State the two laws of thermal radiation.

Correct Answerverified1.Hotter objects emit more rad...View AnswerShow Answer

Define atomic weight (or atomic mass).

Correct AnswerverifiedAtomic weight is the...View AnswerShow Answer

Which of the following objects is not a close approximation of a thermal emitter?

Correct AnswerverifiedShow Answer

Emission lines from different ionization states of the same element appear in the same place in the spectrum.

Correct AnswerverifiedShow Answer

Thermal radiation is defined as

Correct AnswerverifiedShow Answer

Process of Science: The theory of thermal radiation says that hot objects are bluer than cool objects.Does it depend on what the object is made of? How can you test this?

Correct AnswerverifiedThe color of thermal radiation from an o...View AnswerShow Answer

If a material is transparent,then it

Correct AnswerverifiedShow Answer

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1.Hotter objects emit more rad...
View Answer

Correct Answer
verified
Atomic weight is the...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
The color of thermal radiation from an o...
View Answer

Correct Answer
verified