Astronomy Test #2

54 Questions  I  By Smatrypants
Chapters 4-5, 13-14.

  
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1.  Star A has the same luminosity as star B. Also, star A is 3 times as far as Star B from Earth. Then star A is ________ as bright as star B as seen from Earth. 
A.
B.
C.
D.
2.  You research the star Sirius and find that its spectral lines are blue shifted. What does this tell you about Sirius?
A.
B.
C.
D.
E.
3.  The sun's magnetic field is evident in the looped shapes of
A.
B.
C.
D.
E.
4.  The fact that the speed of light is constant (as it travels through a vacuum) means that
A.
B.
C.
D.
5.  The Doppler shift can be used to determine the _________ of an object.
A.
B.
C.
D.
6.  Star C and star D are equally luminous. Star C is twice as far away from Earth as star D. How do the brightness level of stars C and D compare?
A.
B.
C.
D.
7.  A plot of the continuous spectra of five different stars is shown in the figure below. Based on these spectra, which of the stars is the hottest?
A.
B.
C.
D.
8.  The reason to prefer a reflecting over a refracting telescope is its
A.
B.
C.
D.
9.  High temperatures are required to get H nuclei to fuse because they ________ one another because of their __________ electric charges.
A.
B.
C.
D.
10.  If a star's distance is 10 pc, what is its parallax?
A.
B.
C.
D.
11.  Particle accelerators that smash atoms or particles together at high speeds, such as Fermilab or CERN, are important tools used for simulating conditions in
A.
B.
C.
D.
12.  Magnetic fields inside sunspots are ______________those in surrounding regions.
A.
B.
C.
D.
13.  What is the net result of the proton-proton chain?
A.
B.
C.
D.
14.  The visible part of the electromagnetic spectrum can be divided into six color bands of Red, Orange, Yellow, Green, Blue and Violet (from long to short wavelength). A single photon of which of these colors has the greatest amount of energy?
A.
B.
C.
D.
E.
15.  Which of the following layers of the Sun makes up the majority of its interior?    
A.
B.
C.
D.
16.  Which type of binaries are found via Doppler shifts?    
A.
B.
C.
D.
E.
17.  Absolute zero is
A.
B.
C.
D.
E.
18.  Ultraviolet radiation is hard to observe primarily because
A.
B.
C.
D.
19.  Radio telescopes are often connected together to do interferometry. What is the primary problem overcome by radio interferometry?
A.
B.
C.
D.
E.
20.  If continuous spectrum light from a star passes through a cool low density gas on its way to your telescope and spectroscope, _____________ spectrum on the continous spectrum results.
A.
B.
C.
21.  Star E is the same temperature as star F but is four times as luminous. Which star is bigger?    
A.
B.
C.
D.
22.  The most massive part of the atom is (are) the ___________which has (have) a ___________charge
A.
B.
C.
D.
23.  A particular star with the same spectral type as the Sun (G2) has a luminosity of 50 solar luminosities. What does this tell you about the star? 
A.
B.
C.
D.
E.
24.  Parallax would be easier to measure if    
A.
B.
C.
D.
E.
25.  Magnetic field is continuously produced and deformed in the Sun by    
A.
B.
C.
D.
26.  Star A has higher luminosity than Star B, but is farther away. Which has higher apparent brightness?
A.
B.
C.
D.
27.  What is the difference between brightness and luminosity?
A.
B.
C.
D.
28.  Select the order of star color in increasing temperature from cool to hot.
A.
B.
C.
D.
29.  The light we see from the Sun comes from which layer?    
A.
B.
C.
D.
30.  Which electron energy level transition corresponds to a hydrogen atom absorbing a visible-light photon that has a wavelength of 656 nanometers?
A.
B.
C.
D.
E.
31.  Granulation is caused by
A.
B.
C.
D.
E.
32.  If light from a star passes from an excited low density gas seen against the dark background of space to your telescope and spectroscope, __________ spectrum results.
A.
B.
33.  Stars of similar temperatures but different sizes
A.
B.
C.
D.
34.  Binary (double) stars can be detected by
A.
B.
C.
D.
E.
35.  Neutrinos are created in reaction in the _____________ of the sun.
A.
B.
C.
D.
36.  What are the two most important intrinsic properties used to classify stars?
A.
B.
C.
D.
37.  What is the name of the effect when an electromagnetic wave is bent as it passes from one material into another?
A.
B.
C.
D.
38.  Which of the following is the most common type of star?
A.
B.
C.
D.
39.  ______________ has (have) wavelengths that are longer than visible light.
A.
B.
C.
D.
E.
40.  The emission and absorption lines of a given atom occur at the exact same energies.
A.
B.
41.  By what mechanism does radiation reach the Sun's surface from its interior?
A.
B.
C.
D.
42.  Which of these are not associated with the active Sun?
A.
B.
C.
D.
E.
43.  Of the following, which color represents the lowest surface temperature star?
A.
B.
C.
D.
E.
44.  The number of ___________ in the nucleus determines what element the nucleus is.
A.
B.
C.
D.
E.
45.  The lowest energy level in an atom is
A.
B.
C.
D.
E.
46.  Infrared astronomy is often done from high-flying aircraft because
A.
B.
C.
D.
E.
47.  The Arecibo Observatory is:
A.
B.
C.
D.
48.  The entire electromagmetic spectrum can be divided into the seven bands of Radio, Microwave, Infrared, Visivle, Ultraviolet, X-ray, and Gamma-ray (from longest to shortest wavelength). To which of these two bands is Earth's atmosphere the most transparent?
A.
B.
C.
D.
E.
49.  A faster-moving star in a binary is the
A.
B.
C.
D.
50.  Ultraviolet radiation from a star
A.
B.
C.
D.
E.
51.  The ________________ of a telescope is a measure of its ability to show fine detail and depends on the diameter of the objective.
A.
B.
C.
D.
E.
52.  The wavelength of maximum intensity that is emitted by a black body is
A.
B.
C.
D.
E.
53.  What is the wavelength of the longest wavelength light visible to the human eye?
A.
B.
C.
D.
54.  How long does the sunspots cycle last, on average?
A.
B.
C.
D.
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