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Astro 001 Final Exam 2023 Questions and Answers with complete solution
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Astro 001 Final Exam 2023 Questions and Answers with complete solution
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Astro 001 Final Exam 2023 Questions and Answers with complete solutionIf 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? Answer- full planet
What is the reason for the seasons on Earth? Answer- earth is tilted with respect to the
sun by about 23.5 degrees
As compared to a cool star, a hotter star emits: Answer- shorter wavelength, higher frequency, bluer color
At approximately what time does the third quarter Moon rise? Answer- 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? Answer- it will consist of a few bright emission lines at very specific wavelengths
If Earth had its orbit changed so that at all points along its orbit it was always the same
distance from the Sun (circular orbit), how would this affect the seasons on Earth? Answer- 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 information? Answer- its temperature
What do you expect the spectrum of an object that is 1,000,000 Kelvin to be like? Answer- it should peak at X-ray wavelengths
What time of year is it dark all day (and night) at the South pole? Answer- June
A planet with its rotation axis tilted by 40 degrees relative to its orbital plane around
its star would: Answer- have dark all the time on the south pole during its winter
The planets are seen in the Zodiac constellations because: Answer- they orbit the sun in the same plane as the earth does
What makes a transition from a higher energy state to a lower energy state when a
photon is emitted by an atom? Answer- electron Which of the following is FALSE? (light and wavelengths) Answer- 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 121.6 nm. If a cloud of Hydrogen gas
is moving TOWARDS us at 200km/s, what will we detect? Answer- an emission line in the cloud's spectrum with a wavelength shorter than 121.6 mm
why does light come in different colors? Answer- 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? Answer- slightly greater in happy valley than
on mount nittany
what kind of telescope would have to be put in space to be effective Answer- X-ray
dark lines in an absorption spectrum represent: Answer- 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 the
Earth change? Answer- it would decrease by a factor of two
in what way does a 30 meter telescope outperform a 10 meter telescope? Answer- the
images of the 30 meter are 9 times brighter than those of a 10 meter
3 times the size
3 squared
on a planet whose moon is in the same orbital plane as the planet's orbit around its star,
how often will solar eclipses occur? Answer- once every orbit of its moon (its month)
Say that our Moon was Full on May 1, 2007. When was the next First Quarter phase
after that Full Moon? Answer- May 22nd
3 weeks later
why does a neon light appear red Answer- it gives off an emission spectrum with mostly red spectral lines
why don't we see the constellation orion all year? Answer- as the earth orbits the sun, its nighttime side points to different constellations at different points along its orbit
From Earth, in which type of constellation might you find the planet Saturn? Answer- only in a zodiac constellation
What is the main constituent of the atmosphere of Venus? Answer- carbon dioxide
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