Astro 1 Exam 1 PSU
How much more light does a 12 meter telescope collect than a 6 meter telescope? - ✔✔4 times
more
In the spectroscopy game, what did you do to produce emission lines in the spectrum? -
✔✔excite the
...
Astro 1 Exam 1 PSU
How much more light does a 12 meter telescope collect than a 6 meter telescope? - ✔✔4 times
more
In the spectroscopy game, what did you do to produce emission lines in the spectrum? -
✔✔excite the gas in the box
What type of light does not get through earth's atmosphere? - ✔✔x-ray
is light a particle or a wave? - ✔✔both
if a telescope in space is only 1/4 the diameter of a telescope on earth, which of the following is
true? - ✔✔the space telescope has a higher magnification than the larger telescope on the ground
lower-energy radiation has - ✔✔longer wavelengths
from earth, which constellation might you find the planet saturn? - ✔✔taurus
two weeks after the 3rd quarter moon is the - ✔✔first quarter moon
for a star close to the north star, how long does it take to move in a circle the whole way around
the north star? - ✔✔24 hours
An electron in a sodium atom absorbs a photon of light and moves to the next highest energy
level, what will happen? - ✔✔the electron will eventually emit a photon with the same energy as
the one it absorbed
how many constellations are not zodiac constellations? - ✔✔75 or 76
A star is a hot dense gas surrounded by a cooler, low density atmosphere. What type of spectrum
will a star create? - ✔✔absorption spectrum
What did Newton's law of universal gravitation tell us about how gravity works? - ✔✔the force
of gravity from the sun will be stronger on a larger mass object
how often is the sun in front of a zodiac constellation? - ✔✔always
as compared to a cool star, a hotter star emits: - ✔✔shorter wavelength, higher frequency blue
color
what happens when the electrons in atoms of a particular chemical element jump from higher to
lower energy levels? - ✔✔bright lines appear in the spectrum at particular energy levels
how much of the total surface area of the moon is illuminated by sunlight during the full moon
phase? - ✔✔one half
which type of radiation has the lowest energy? - ✔✔infrared and radio radiation
which of the following is false? - ✔✔the energy of a photon increases in proportion to the
wavelength of the radiation
compared to blue light, red light has: - ✔✔longer wavelength, smaller frequency, smaller energy
which of the following is false (part 2) - ✔✔room temperature is about 30000 degrees kelvin
which is in the ultraviolet part of the spectrum
the surface gravity on mars is 40% of the surface gravity on earth, this means: - ✔✔you can
jump higher on mars than on earth
two planets have the same mass, but planet b has 3x more than planet A, how do their surface
gravities compare? - ✔✔Planet b has 1/3 the surface gravity of planet A
In what was does a 5 meter telescope outperform a 1 meter telescope? - ✔✔its images are 25x
brighter than a 1 meter
Since the area of a circle is pi times its radius squared, if you double the width of a telescope's
circular mirror: - ✔✔it's light gathering power is multiplied by a factor of 4
of the following types of radiation, which has the highest frequency? - ✔✔x-rays
The electrons in a cloud of hydrogen gas are making the transition from excited, high energy
states to the ground, lowest energy state. What does the spectrum of this gas look like? - ✔✔It
will consist of a few bright emission lines at very specific wavelengths
Which of the following is false (part 3) - ✔✔the north pole is tilted away from the sun during the
northern hemisphere summer
If I apply the exact same force to a pebble and a boulder, what will happen? - ✔✔the pebble will
move faster
When is the waning gibbous moon the highest in the sky? - ✔✔about 3am
what time of the year is it dark all day and night at the south pole of earth? - ✔✔june
what is a continuous spectrum? - ✔✔light at all wavelengths
constellations close to the north pole of earth - ✔✔move in a circle around the north star, polaris,
over the course of a night
when does the new moon set? - ✔✔sunset
what objects shadow falls on the moon during a lunar eclipse? - ✔✔the earth
in the spectroscopy game, what did you do to produce a continuous spectrum with a bluer color?
- ✔✔lowered the temperature of the lamp
which of the following solar system objects has the weakest gravity? - ✔✔the moon
the rotation of the earth is: - ✔✔titled about 23 degrees relative to the axis of the earth's orbit
around the sun
when are the nights longest compared to the days? - ✔✔december 21st in both hemispheres
something glowing in visible light probably has a temperature of __ kelvins - ✔✔a few thousand
even the largest ground-based telescopes have resolution restrictions imposed by: -
✔✔atmospheric blurring of images
the moon has about 1/100th of the mass of the earth and 1/4 the radius. What is the surface
gravity of the moon compared to earth? - ✔✔16/100
Which would have the longest day and the shortest year? - ✔✔a planet that rotated slowly on its
axis and orbited the sun rapidly
a moon orbits its planet in exactly the same plane as the planet orbits its star. how often does the
planet experience a solar eclipse? - ✔✔Once every orbit of its moon (its month)
the angular resolution of a telescope is important because - ✔✔it allows us to separate two
nearby light sources
what time is the waning crescent moon directly overhead? - ✔✔9am
a new planet orbits its star faster than the earth orbits the sun and it rotates more slowly that the
earth rotates which of the following is true? - ✔✔the new planet has a shorter year than earth and
a longer day than earth
a star has a surface temperature of 50000K. in which region of the electromagnetic spectrum
does the peak brightness occur? - ✔✔ultraviolet
stars that are in the same constellation: - ✔✔are likely to be at very different distances from us
two planets have the same radius. if planet A is 5x more massive than planet B, how does gravity
differ on the surface of the planets? - ✔✔gravity is 5x stronger on planet A
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