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| Started by | Sergio <invalid@invalid.com> |
|---|---|
| First post | 2016-07-22 21:08 -0500 |
| Last post | 2016-07-23 17:59 -0500 |
| Articles | 3 — 2 participants |
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Questions for Astronomy Physics Exam2 Sergio <invalid@invalid.com> - 2016-07-22 21:08 -0500
Re: Questions for Astronomy Physics Exam2 benj <benj@nobody.net> - 2016-07-23 17:34 -0400
Re: Questions for Astronomy Physics Exam2 Sergio <invalid@invalid.com> - 2016-07-23 17:59 -0500
| From | Sergio <invalid@invalid.com> |
|---|---|
| Date | 2016-07-22 21:08 -0500 |
| Subject | Questions for Astronomy Physics Exam2 |
| Message-ID | <nmujj8$2p7$2@gioia.aioe.org> |
answers should be easy for physics Dudes, answers can be found near
published link
Astronomy I: Practice Questions for EXAM 2
1. Which of the following types of electromagnetic radiation has
a wavelength adjacent to but longer than visible light?
a. radio
b. infrared
c. X ray
d. ultraviolet
e. gamma ray
2. The energy of a photon is
a. proportional to the wavelength and inversely proportional
to the frequency.
b. proportional to the wavelength and proportional to the
frequency.
c. inversely proportional to the wavelength and inversely
proportional to the frequency.
d. inversely proportional to the wavelength and proportional
to the frequency.
3. Radio waves have
a. high energy and long wavelength.
b. low energy and long wavelength.
c. low energy and short wavelength.
d. high energy and short wavelength.
4. If Star A is hotter than Star B, and Star A is emitting most
of its light at a wavelength corresponding to yellow light,
which of the following statements is true?
a. Star B will emit most of its light at a wavelength longer
than yellow
b. Star B will emit most of its light at a wavelength shorter
than yellow
c. Star B will emit most of its light at the same wavelength
as Star A
d. more information is required to answer this question
5. If two stars have the same surface area but one has 3 times
the temperature of the other, how many times more energy is
radiated by the more luminous star?
a. 3
b. 9
c. 12
d. 27
e. 81
6. Star A is radiating two times as much energy as Star B, but it
is two times the distance from us. Which star will appear
brighter, and by how much?
a. Star A will be 2 times brighter
b. Star B will be 2 times brighter
c. Star A will be 4 times brighter
d. Star B will be 4 times brighter
e. they will both have the same observed brightness
7. Which one of the following types of spectrum always occurs
with an absorption (dark line) spectrum?
a. bright line
b. emission line
c. continuous
8. Spectral lines unique to each type of atom are caused by
a. each atom having a unique set of protons.
b. the unique sets of electron orbits.
c. the neutron-electron interaction being unique for each
atom.
d. each type of photon emitted by the atom being unique.
e. none of the above; spectral lines are not unique to each
type of atom.
9. A star has an absorption spectrum showing many lines
corresponding to silicon. Before it reaches an observer, the
light from this star passes through a cool gas cloud
containing a large amount of silicon. What will the observer
detect?
a. an absorption spectrum with many silicon lines
b. an absorption and emission spectrum with lines
corresponding to silicon
c. an emission spectrum of many silicon lines
d. a continuous spectrum
10. Consider a cloud of (cool) gas between a star and an observer
to be moving away from a source of continuous radiation (and
towards the observer). Suppose the atoms in the gas have two
energy levels separated by an energy corresponding to 5000 Angstroms.
The observer will see a spectrum with absorption at a
wavelength
a. less than 5000 Angstroms.
b. equal to 5000 Angstroms.
c. greater than 5000 Angstroms.
d. no absorption will take place.
11. If an electron moves from a lower energy level to the next
higher energy level, then
a. the atom has become excited.
b. the atom has become ionized.
c. the atom's light will be blue shifted.
d. the atom's light will be red shifted.
12. The degree of ionization of an atom (i.e. the number of
electrons lost) depends on
a. the level of the ground state.
b. the temperature of the gas.
c. the energy difference between the ground state and the
first excited state.
d. the distance to the observer.
13. Which of the following types of light can only be observed
from space?
a. visible
b. radio
c. infrared
d. gamma ray
14. The greater the __________ the greater the light gathering
power. (Pick the ONE most correct choice.)
a. objective focal length
b. resolution
c. objective thickness
d. objective area
e. magnification
15. The greater the __________ the greater the resolution of a
telescope. (Pick the ONE most correct choice.)
a. objective focal length
b. eyepiece focal length
c. objective diameter
d. objective thickness
e. magnification
16. For which of the following types of telescopes is
interferometry commonly used?
a. X-ray detector
b. ultraviolet telescope in orbit
c. visible telescope
d. multiple radio telescope dishes
17. If telescope A has a mirror twice the diameter of telescope B, the
light gathering power of telescope A will be __________
times that of B?
a. 2
b. 4
c. 8
d. 16
18. Which one of the following is a primary reason astronomers desire to
have telescopes above the Earth's atmosphere?
a. the magnification will be improved
b. observations may be made in wavelengths that can not
be seen from the surface of the Earth.
c. observations may be made in the radio region of the
spectrum
d. the resolving power will be better in space because
it no longer depends on the telescope diameter as is the case for
telescopes on the Earth's surface
19. Seeing refers to
a. the lack of clouds in the atmosphere.
b. how far a telescope can see.
c. the faintest object observable through a telescope.
d. the smearing of an image caused by atmospheric motions
e. the appearance of an image caused by the variation of
refraction with color
20. Radio telescopes are large because of the small amount of energy
carried by radio waves and
a. because bigger is always better
b. because the short wavelength radio waves already have
such a high resolution
c. because a bigger telescope is needed to increase the
resolution with the long wavelength radio waves
d. because they are cheap to construct
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| From | benj <benj@nobody.net> |
|---|---|
| Date | 2016-07-23 17:34 -0400 |
| Message-ID | <5793e2f0$0$28845$c3e8da3$88b277c5@news.astraweb.com> |
| In reply to | #590418 |
On 7/22/2016 10:08 PM, Sergio wrote: > answers should be easy for physics Dudes, answers can be found near > published link > > Astronomy I: Practice Questions for EXAM 2 Sergio, you have no sense of fun! What a missed opportunity! Here is an astronomy I quiz and you just pass up the opportunity to watch "professor" Wormley or HVAC the mighty and magnificent get their asses handed to them as they try to answer these basic questions about astronomy of which they both pretend to be huge experts. Sergio, your life must be very dull.
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| From | Sergio <invalid@invalid.com> |
|---|---|
| Date | 2016-07-23 17:59 -0500 |
| Message-ID | <nn0ssq$17dn$1@gioia.aioe.org> |
| In reply to | #590494 |
On 7/23/2016 4:34 PM, benj wrote: > On 7/22/2016 10:08 PM, Sergio wrote: >> answers should be easy for physics Dudes, answers can be found near >> published link >> >> Astronomy I: Practice Questions for EXAM 2 > > Sergio, you have no sense of fun! > > What a missed opportunity! > > Here is an astronomy I quiz and you just pass up the opportunity to > watch "professor" Wormley or HVAC the mighty and magnificent get their > asses handed to them as they try to answer these basic questions about > astronomy of which they both pretend to be huge experts. > > Sergio, your life must be very dull. > nothing from either of them, they did not pass the test. HVAC is distracted by fish, Wormley is on the Pause, like global worming. I will get simpler; 1. Why is the Earth round, or shaped like a big ball, almost spherical ? A. because Gravity uses 1/r^2 law B. because if it was a cube, the oceans would not get to the corners C. Because there are no holes in the surface to the hollow inside D. They were left in the polishing machine too long. I send these posts via my iPhone while skydiving, so it is exciting...
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