AST Test 2 Questions and Answers Rated A
1. Light contains both electric and magnetic fields. True
2. The atmosphere of Earth transmits all frequencies of False
electromagnetic radiation approximately equally well.
3. All properties of the Planck curve (Blackbody curve) True
depend only on the temperature of the blackbody
from which it originates.
4. Humans emit radiation that peaks in the infrared re- True
gion of the spectrum.
5. A blue star has a higher surface temperature than a True
red star.
6. In order for a wave to continue to move, it is necessary False
for material to be transported along the direction of
its motion.
7. According to current physical theories and observa- True
tions, nothing can move faster than the speed of light.
8. As a star's temperature increases, the frequency of True
peak emission also increases.
9. One way to produce an electromagnetic wave is to True
start an electrically charged particle vibrating.
10. The temperature of an object can only be zero on the True
Kelvin scale if all of the thermal motions of the con-
stituent particles (molecules, atoms, electrons, etc.)
within it are fully minimized and no further heat en-
ergy can be extracted from it.
, AST Test 2 Questions and Answers Rated A
11. Which of the following wavelengths can be observed Radio
easily by a telescope located on Earth's surface?
Radio
Gamma Ray
UV
X-Ray
12. he graph below shows the blackbody spectra for three Star C
different stars. Which of the stars is at the highest
temperature?
Star A
Star B
Star C
13. Which of the following wavelengths of light emitted by Gamma
the Sun is most effectively blocked by Earth's atmos-
phere?
Radio
Infrared
Gamma
Visible
14. Star B
, AST Test 2 Questions and Answers Rated A
Use the graph below to determine which of the two
stars (A or B) emits light with the longer peak wave-
length?
Star A
Star B
Both stars peak emissions are the same wavelength
None of the above are possible
15. Imagine that you are the head of a funding agency an ultraviolet telescope in
that can afford to build one telescope. Which of the orbit around Earth
following proposed telescopes would be best to sup-
port?
16. Use the graph below to determine which of the fol- Star A would appear more
lowing best describes how Star A would appear as blue than Star B.
compared with Star B?
Star A would appear more red than Star B.
Star A would appear more blue than Star B.
Both stars would appear more red than blue.
Both stars would appear more blue than red.
None of the above.
17. Use the graph at right to determine which of the two The two stars have the
stars (A or C) is at a higher temperature? same temperature.
, AST Test 2 Questions and Answers Rated A
Star A
Star C
The two stars have the same temperature.
It is not possible to infer this relationship.
18. A lump of lead is heated to a high temperature. An- The hotter lump appears
other lump of lead that is twice as large is heated to bluer.
a lower temperature. Which lump of material appears
bluer?
Both lumps look the same color.
Cannot tell which lump looks bluer.
The hotter lump appears bluer.
The cooler lump appears bluer.
19. Consider this diagram. Which statement is true? The wavelength is 6.
The wavelength is 12.
The wavelength is 6.
The wavelength is 8.
The wavelength is 4.
The wavelength cannot be determined from this dia-
gram.
20. Star A is larger than Star C.
1. Light contains both electric and magnetic fields. True
2. The atmosphere of Earth transmits all frequencies of False
electromagnetic radiation approximately equally well.
3. All properties of the Planck curve (Blackbody curve) True
depend only on the temperature of the blackbody
from which it originates.
4. Humans emit radiation that peaks in the infrared re- True
gion of the spectrum.
5. A blue star has a higher surface temperature than a True
red star.
6. In order for a wave to continue to move, it is necessary False
for material to be transported along the direction of
its motion.
7. According to current physical theories and observa- True
tions, nothing can move faster than the speed of light.
8. As a star's temperature increases, the frequency of True
peak emission also increases.
9. One way to produce an electromagnetic wave is to True
start an electrically charged particle vibrating.
10. The temperature of an object can only be zero on the True
Kelvin scale if all of the thermal motions of the con-
stituent particles (molecules, atoms, electrons, etc.)
within it are fully minimized and no further heat en-
ergy can be extracted from it.
, AST Test 2 Questions and Answers Rated A
11. Which of the following wavelengths can be observed Radio
easily by a telescope located on Earth's surface?
Radio
Gamma Ray
UV
X-Ray
12. he graph below shows the blackbody spectra for three Star C
different stars. Which of the stars is at the highest
temperature?
Star A
Star B
Star C
13. Which of the following wavelengths of light emitted by Gamma
the Sun is most effectively blocked by Earth's atmos-
phere?
Radio
Infrared
Gamma
Visible
14. Star B
, AST Test 2 Questions and Answers Rated A
Use the graph below to determine which of the two
stars (A or B) emits light with the longer peak wave-
length?
Star A
Star B
Both stars peak emissions are the same wavelength
None of the above are possible
15. Imagine that you are the head of a funding agency an ultraviolet telescope in
that can afford to build one telescope. Which of the orbit around Earth
following proposed telescopes would be best to sup-
port?
16. Use the graph below to determine which of the fol- Star A would appear more
lowing best describes how Star A would appear as blue than Star B.
compared with Star B?
Star A would appear more red than Star B.
Star A would appear more blue than Star B.
Both stars would appear more red than blue.
Both stars would appear more blue than red.
None of the above.
17. Use the graph at right to determine which of the two The two stars have the
stars (A or C) is at a higher temperature? same temperature.
, AST Test 2 Questions and Answers Rated A
Star A
Star C
The two stars have the same temperature.
It is not possible to infer this relationship.
18. A lump of lead is heated to a high temperature. An- The hotter lump appears
other lump of lead that is twice as large is heated to bluer.
a lower temperature. Which lump of material appears
bluer?
Both lumps look the same color.
Cannot tell which lump looks bluer.
The hotter lump appears bluer.
The cooler lump appears bluer.
19. Consider this diagram. Which statement is true? The wavelength is 6.
The wavelength is 12.
The wavelength is 6.
The wavelength is 8.
The wavelength is 4.
The wavelength cannot be determined from this dia-
gram.
20. Star A is larger than Star C.
