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ASTRO 1504 FINAL EXAM WITH QUESTIONS AND VERIFIED ANSWERS
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ASTRO 1504 FINAL EXAM WITH QUESTIONSAND VERIFIED ANSWERS
If an event were to take place on the Sun, how long would it take for the for us to
know about it? - ANSWER 8 minutes
How do the wavelength and frequency of red light compare to the wavelength and
frequency of blue light? - ANSWER Red light has a longer wavelength and lower
frequency than does blue light.
The angular resolution of a ground-based telescope is usually set by: - ANSWER
atmospheric seeing.
Solar and lunar eclipses are rare because the Moon's orbital plane is tipped by: -
ANSWER 5.2 degrees relative to Earth's orbital plane
No matter where you are on Earth, stars appear to rotate about a point called the: -
ANSWER celestial pole.
The Balmer series of neutral hydrogen, H I involves transitions of the electron
between: - ANSWER The second level (n=2) and higher excited states (n > 3)
The speed of a light wave: - ANSWER is altered by a refractive medium.
Our universe is approximately years old - ANSWER 14 billion
Which of the following produces an absorption line spectrum: - ANSWER A stellar
atmosphere
The Doppler shift can be used to determine the _____ of an object. - ANSWER
radial velocity
. During which lunar phase do solar eclipses occur? - ANSWER new
To do spectroscopy we run light through a slit. Which of the following is
,FALSE? - ANSWER (a) The light will be dispersed over the surface of the
detector, according to its
wavelength
(b) some of the light will be lost
(c) We need larger telescopes to do spectroscopy than imaging
(d) We can do spectroscopy in poor seeing since we don't need to resolve images.
(e) all of the above are true
What is the relationship between the color of an object and its wavelength? -
ANSWER The color is determined by the wavelength region where the object is
brightest
How does the speed of light traveling through a medium (such as air or glass)
compare
to the speed of light in a vacuum? - ANSWER It is always less than the speed of
light in a vacuum.
Which of the following is FALSE? - ANSWER A scientific theory is an undisputed
fact
The ecliptic plane is defined by ____ motion in the sky. - ANSWER the suns
Which of the following lists different types of electromagnetic radiation in order of
increasing wavelength? - ANSWER gamma rays, ultraviolet, visible, infrared, radio
waves
Which of the following is FALSE? - ANSWER The observed phase of the Moon
changes dramatically over the course of a single
night.
Which telescope would collect 100 times more light than a 1-meter telescope? -
ANSWER 10-meter telescope
, The speed of light is about: - ANSWER 300,000 km/s.
If the star Polaris has an altitude of 35 degrees, then we know that: - ANSWER our
latitude is +35 degrees.
Cameras that use adaptive optics provide higher spatial resolution images primarily
because: - ANSWER deformable mirrors are used to correct the blurring due to
Earth's atmosphere.
Which of the following causes the biggest problem in detecting infrared photons
from
an astronomical object? - ANSWER water vapor
The shortest day of the year for a person living in the Northern Hemisphere is the: -
ANSWER winter solstice (December 21).
When the Northern Hemisphere experiences summer, the Southern Hemisphere
experiences: - ANSWER winter.
The distance to the nearest, large, spiral galaxy, Andromeda, is 2.5 million
light-years.
How long does it take light to travel from us to Andromeda? - ANSWER 2.5
million years
All stars denoted on the celestial sphere are: - ANSWER at varying distances from
Earth.
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