Astro 1 Final Exam |99 Accurate Q’s and
A’s
If a planet is seeing its moon in the new phase right now, in what phase
would the planet appear to be when viewed from its moon? - -full planet
- What is the reason for the seasons on earth - -earth is tilted with respect
to the sun by about 23.5 degrees
- As compared to a cool star a hotter star emits - -shorter wavelength,
higher frequency, bluer color
- at approximately what time does the third quarter moon rise - -midnight
- the electrons in a cloud of hydrogen gas are making the transition from
excited states to the ground state. What does the spectrum of this cloud of
gas look like? - -it will consist of a few bright emission lines at a very specific
wavelengths
- If earth had its orbit changed so that at all the point along its orbit it was
always the same distance from the sun (circular) how would this effect the
seasons on earth? - -the same as they are now
- I detect a star giving off more ultraviolet light than green light. What
property of the star can I estimate with this info - -its temperature
- What do you expect the spectrum of an object that is 1,000,000 kelvin to
be like - -it should peak at x ray wavelengths
- what time of year is it dark all day (and night) at the South pole - -june
- A planet with its rotation axis tilted by 40 degrees relative to its orbital
plane around its star would - -have dark all the time on the south pole
during its winter
- The planets are seen in the Zodiac constellations because - -the orbit the
sun in the same plane as the earth does
- What makes a transition from higher energy state to lower energy state
when a photon is emitted by an atom? - -electron
- 13. Which of the following is FALSE?
a) Light, radio, ultraviolet, and gamma rays are all forms of electromagnetic
radiation.
, b) Emission spectra are characterized by narrow, bright lines of different
colors.
c) An absorption spectrum appears as a continuous spectrum interrupted by
a series of
dark lines.
d) The energy of a photon is inversely proportional to the wavelength of the
radiation.
e) The wavelengths of the emission lines produced by an element are
different from the
wavelengths of an absorption line produced by the same element. - -The
wavelengths of the emission lines produced by an element are different from
the wavelengths of an absorption line produced by the same element
- One of the lines of hydrogen has a wavelength of 121.6nm. If a cloud of
hydrogen gas is moving towards us at 200 km/s, what will we detect? - -An
emission line in the cloud's spectrum with a wavelength shorter than 121.6
nm
- Why does light come in different colors - -differences in wavelength
- Say you are in the bottom of Happy Valley. How does the force of gravity
compare to what it would be on top of Mount Nittany? - -slightly greater in
happy valley than on mount nittany
- what kind of telescope would have to be put in space to be effective - -
xray
- dark lines in an absorption spectrum represent - -particular energies of
light coming from a distant object that are absorbed by material in between
- if the mass of the sun were cut in half, how would the force between the
sun and earth change? - -it would decrease by a factor of two
- In what way does a 30 meter telescope outperform a 10 meter telescope -
-the images of a 30 meter are 9 times brighter than a 10 meter
- On a planet whose moon is the same orbital plane as the planets orbit
around its star, how often will solar eclipses occur - -once every orbit of its
moon (its month)
- say that our moon was full on May 1st 2007. When was the next first
quarter phase after that full moon? - -may 22 (3 weeks later)
- Why does a neon light appear red? - -it gives off an emission spectrum
with mostly red spectral lines
A’s
If a planet is seeing its moon in the new phase right now, in what phase
would the planet appear to be when viewed from its moon? - -full planet
- What is the reason for the seasons on earth - -earth is tilted with respect
to the sun by about 23.5 degrees
- As compared to a cool star a hotter star emits - -shorter wavelength,
higher frequency, bluer color
- at approximately what time does the third quarter moon rise - -midnight
- the electrons in a cloud of hydrogen gas are making the transition from
excited states to the ground state. What does the spectrum of this cloud of
gas look like? - -it will consist of a few bright emission lines at a very specific
wavelengths
- If earth had its orbit changed so that at all the point along its orbit it was
always the same distance from the sun (circular) how would this effect the
seasons on earth? - -the same as they are now
- I detect a star giving off more ultraviolet light than green light. What
property of the star can I estimate with this info - -its temperature
- What do you expect the spectrum of an object that is 1,000,000 kelvin to
be like - -it should peak at x ray wavelengths
- what time of year is it dark all day (and night) at the South pole - -june
- A planet with its rotation axis tilted by 40 degrees relative to its orbital
plane around its star would - -have dark all the time on the south pole
during its winter
- The planets are seen in the Zodiac constellations because - -the orbit the
sun in the same plane as the earth does
- What makes a transition from higher energy state to lower energy state
when a photon is emitted by an atom? - -electron
- 13. Which of the following is FALSE?
a) Light, radio, ultraviolet, and gamma rays are all forms of electromagnetic
radiation.
, b) Emission spectra are characterized by narrow, bright lines of different
colors.
c) An absorption spectrum appears as a continuous spectrum interrupted by
a series of
dark lines.
d) The energy of a photon is inversely proportional to the wavelength of the
radiation.
e) The wavelengths of the emission lines produced by an element are
different from the
wavelengths of an absorption line produced by the same element. - -The
wavelengths of the emission lines produced by an element are different from
the wavelengths of an absorption line produced by the same element
- One of the lines of hydrogen has a wavelength of 121.6nm. If a cloud of
hydrogen gas is moving towards us at 200 km/s, what will we detect? - -An
emission line in the cloud's spectrum with a wavelength shorter than 121.6
nm
- Why does light come in different colors - -differences in wavelength
- Say you are in the bottom of Happy Valley. How does the force of gravity
compare to what it would be on top of Mount Nittany? - -slightly greater in
happy valley than on mount nittany
- what kind of telescope would have to be put in space to be effective - -
xray
- dark lines in an absorption spectrum represent - -particular energies of
light coming from a distant object that are absorbed by material in between
- if the mass of the sun were cut in half, how would the force between the
sun and earth change? - -it would decrease by a factor of two
- In what way does a 30 meter telescope outperform a 10 meter telescope -
-the images of a 30 meter are 9 times brighter than a 10 meter
- On a planet whose moon is the same orbital plane as the planets orbit
around its star, how often will solar eclipses occur - -once every orbit of its
moon (its month)
- say that our moon was full on May 1st 2007. When was the next first
quarter phase after that full moon? - -may 22 (3 weeks later)
- Why does a neon light appear red? - -it gives off an emission spectrum
with mostly red spectral lines
