Astronomy exam 3 ||Latest Exam With
Questions And Answers||
What value tells us how bright an object will appear from Earth? -CORRECT ANSWER
Apparent Magnitude
What values tells us about the object's actual brightness? -CORRECT ANSWER
Absolute Magnitude
The full Moon has an apparent magnitude of -12.6, and when Mars is as its brightness
in the night sky, its apparent magnitude is +2.0. Which of the two objects has the bigger
apparent magnitude number? -CORRECT ANSWER Mars
The full Moon has an apparent magnitude of -12.6, and when Mars is as its brightness
in the night sky, its apparent magnitude is +2.0. Which object will look brighter from
Earth, the full Moon or Mars? How do you know? -CORRECT ANSWER The Moon
because it has a smaller number
The full Moon has an apparent magnitude of -12.6, and when Mars is as its brightness
in the night sky, its apparent magnitude is +2.0. If a new object were discovered that
looked even dimmer from Earth than Mars does, make up a possible apparent
magnitude number for it. -CORRECT ANSWER +5.0
The star Lee has an apparent magnitude of 0.1 and is located about 250 parsecs away
from Earth. Which of the following is most likely the absolute magnitude for Lee?
Explain your reasoning. -CORRECT ANSWER -6.9; Because since its so far away it
appears dimmer but it actually would be very bright if it was closer.
What is the variable used to represent apparent magnitude? -CORRECT ANSWER m
What is the variable used to represent absolute magnitude? -CORRECT ANSWER M
Star A: m=1 M=1
Star B: m=1 M=2
Star C: m=5 M=4
Star D: m=4 M=4
Which object appears bright from Earth: Star C or Star D? Explain your reasoning. -
CORRECT ANSWER Star D, because it has the lower number indicating it is brighter
Star A: m=1 M=1
Star B: m=1 M=2
Star C: m=5 M=4
, Star D: m=4 M=4
Which object is actually brighter: Star A or Star D? Explain your reasoning. -CORRECT
ANSWER Star A, because it has the lower number indicating it is brighter
Star A: m=1 M=1
Star B: m=1 M=2
Star C: m=5 M=4
Star D: m=4 M=4
For Stars A-D, state whether the star is closer than, farther than, or exactly 10 parsecs
away from Earth. Explain your reasoning. -CORRECT ANSWER Closer than 10
parsecs: Star B
Farther than 10 parsecs: Star C
Exactly 10 parsecs: Star A and Star D
What does m=M mean? -CORRECT ANSWER The apparent magnitude and the
absolute magnitude are equal placing the stars exactly 10 parsecs away
What does m<M mean? -CORRECT ANSWER The apparent magnitude is less than
the absolute magnitude placing the star farther than 10 parsecs away
What does m>M mean? -CORRECT ANSWER The apparent magnitude is greater than
the absolute magnitude placing the star closer than 10 parsecs away
Would the apparent magnitude number of Star A increase, decrease, or stay the same,
if it were located at a distance of 40 parsecs? What about the absolute magnitude
number? Explain your reasoning. -CORRECT ANSWER Makes it increase because it's
moving it farther away and the absolute magnitude never changes.
Star F is known to have an apparent magnitude of -26.7 and an absolute magnitude of
4.8. Where might this star be located? What is the Name of this star? Explain your
reasoning. -CORRECT ANSWER Very near Earth; The Sun; With an apparent
magnitude of -26.7, this star unquestionable appears the brightest in the sky. And since
its absolute magnitude is 4.0, this star must be very close to Earth.
Comparing the visible and the infrared light, which would you say has an easier time
getting through our atmosphere? Which experiences more absorption? -CORRECT
ANSWER Visible has the easier time and infrared experience more absorption because
of the difference in wavelengths
Comparing the ultraviolet and infrared types of light, which would you say has an easier
time getting through our atmosphere? Which experiences more absorption? -
CORRECT ANSWER Infrared has a easier time getting through and there is very little
UV light that gets in.
Questions And Answers||
What value tells us how bright an object will appear from Earth? -CORRECT ANSWER
Apparent Magnitude
What values tells us about the object's actual brightness? -CORRECT ANSWER
Absolute Magnitude
The full Moon has an apparent magnitude of -12.6, and when Mars is as its brightness
in the night sky, its apparent magnitude is +2.0. Which of the two objects has the bigger
apparent magnitude number? -CORRECT ANSWER Mars
The full Moon has an apparent magnitude of -12.6, and when Mars is as its brightness
in the night sky, its apparent magnitude is +2.0. Which object will look brighter from
Earth, the full Moon or Mars? How do you know? -CORRECT ANSWER The Moon
because it has a smaller number
The full Moon has an apparent magnitude of -12.6, and when Mars is as its brightness
in the night sky, its apparent magnitude is +2.0. If a new object were discovered that
looked even dimmer from Earth than Mars does, make up a possible apparent
magnitude number for it. -CORRECT ANSWER +5.0
The star Lee has an apparent magnitude of 0.1 and is located about 250 parsecs away
from Earth. Which of the following is most likely the absolute magnitude for Lee?
Explain your reasoning. -CORRECT ANSWER -6.9; Because since its so far away it
appears dimmer but it actually would be very bright if it was closer.
What is the variable used to represent apparent magnitude? -CORRECT ANSWER m
What is the variable used to represent absolute magnitude? -CORRECT ANSWER M
Star A: m=1 M=1
Star B: m=1 M=2
Star C: m=5 M=4
Star D: m=4 M=4
Which object appears bright from Earth: Star C or Star D? Explain your reasoning. -
CORRECT ANSWER Star D, because it has the lower number indicating it is brighter
Star A: m=1 M=1
Star B: m=1 M=2
Star C: m=5 M=4
, Star D: m=4 M=4
Which object is actually brighter: Star A or Star D? Explain your reasoning. -CORRECT
ANSWER Star A, because it has the lower number indicating it is brighter
Star A: m=1 M=1
Star B: m=1 M=2
Star C: m=5 M=4
Star D: m=4 M=4
For Stars A-D, state whether the star is closer than, farther than, or exactly 10 parsecs
away from Earth. Explain your reasoning. -CORRECT ANSWER Closer than 10
parsecs: Star B
Farther than 10 parsecs: Star C
Exactly 10 parsecs: Star A and Star D
What does m=M mean? -CORRECT ANSWER The apparent magnitude and the
absolute magnitude are equal placing the stars exactly 10 parsecs away
What does m<M mean? -CORRECT ANSWER The apparent magnitude is less than
the absolute magnitude placing the star farther than 10 parsecs away
What does m>M mean? -CORRECT ANSWER The apparent magnitude is greater than
the absolute magnitude placing the star closer than 10 parsecs away
Would the apparent magnitude number of Star A increase, decrease, or stay the same,
if it were located at a distance of 40 parsecs? What about the absolute magnitude
number? Explain your reasoning. -CORRECT ANSWER Makes it increase because it's
moving it farther away and the absolute magnitude never changes.
Star F is known to have an apparent magnitude of -26.7 and an absolute magnitude of
4.8. Where might this star be located? What is the Name of this star? Explain your
reasoning. -CORRECT ANSWER Very near Earth; The Sun; With an apparent
magnitude of -26.7, this star unquestionable appears the brightest in the sky. And since
its absolute magnitude is 4.0, this star must be very close to Earth.
Comparing the visible and the infrared light, which would you say has an easier time
getting through our atmosphere? Which experiences more absorption? -CORRECT
ANSWER Visible has the easier time and infrared experience more absorption because
of the difference in wavelengths
Comparing the ultraviolet and infrared types of light, which would you say has an easier
time getting through our atmosphere? Which experiences more absorption? -
CORRECT ANSWER Infrared has a easier time getting through and there is very little
UV light that gets in.
