Astronomy Test #2

54 Questions  I  By Smatrypants
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 Astronomy Test #2
Chapters 4-5, 13-14.

  
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1.  ______________ has (have) wavelengths that are longer than visible light.
A.
B.
C.
D.
E.
2.  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.
3.  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.
4.  The wavelength of maximum intensity that is emitted by a black body is
A.
B.
C.
D.
E.
5.  Of the following, which color represents the lowest surface temperature star?
A.
B.
C.
D.
E.
6.  Ultraviolet radiation is hard to observe primarily because
A.
B.
C.
D.
7.  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.
8.  Radio telescopes are often connected together to do interferometry. What is the primary problem overcome by radio interferometry?
A.
B.
C.
D.
E.
9.  The Arecibo Observatory is:
A.
B.
C.
D.
10.  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.
11.  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.
12.  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.
13.  The reason to prefer a reflecting over a refracting telescope is its
A.
B.
C.
D.
14.  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.
15.  The lowest energy level in an atom is
A.
B.
C.
D.
E.
16.  Ultraviolet radiation from a star
A.
B.
C.
D.
E.
17.  What is the wavelength of the longest wavelength light visible to the human eye?
A.
B.
C.
D.
18.  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.
19.  The most massive part of the atom is (are) the ___________which has (have) a ___________charge
A.
B.
C.
D.
20.  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.
21.  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.
22.  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.
23.  The fact that the speed of light is constant (as it travels through a vacuum) means that
A.
B.
C.
D.
24.  The number of ___________ in the nucleus determines what element the nucleus is.
A.
B.
C.
D.
E.
25.  The emission and absorption lines of a given atom occur at the exact same energies.
A.
B.
26.  The Doppler shift can be used to determine the _________ of an object.
A.
B.
C.
D.
27.  Infrared astronomy is often done from high-flying aircraft because
A.
B.
C.
D.
E.
28.  Absolute zero is
A.
B.
C.
D.
E.
29.  By what mechanism does radiation reach the Sun's surface from its interior?
A.
B.
C.
D.
30.  High temperatures are required to get H nuclei to fuse because they ________ one another because of their __________ electric charges.
A.
B.
C.
D.
31.  Stars of similar temperatures but different sizes
A.
B.
C.
D.
32.  If a star's distance is 10 pc, what is its parallax?
A.
B.
C.
D.
33.  The sun's magnetic field is evident in the looped shapes of
A.
B.
C.
D.
E.
34.  Which of the following is the most common type of star?
A.
B.
C.
D.
35.  What are the two most important intrinsic properties used to classify stars?
A.
B.
C.
D.
36.  Select the order of star color in increasing temperature from cool to hot.
A.
B.
C.
D.
37.  Which of the following layers of the Sun makes up the majority of its interior?    
A.
B.
C.
D.
38.  Granulation is caused by
A.
B.
C.
D.
E.
39.  How long does the sunspots cycle last, on average?
A.
B.
C.
D.
40.  Magnetic fields inside sunspots are ______________those in surrounding regions.
A.
B.
C.
D.
41.  Which of these are not associated with the active Sun?
A.
B.
C.
D.
E.
42.  Star A has higher luminosity than Star B, but is farther away. Which has higher apparent brightness?
A.
B.
C.
D.
43.  Neutrinos are created in reaction in the _____________ of the sun.
A.
B.
C.
D.
44.  A faster-moving star in a binary is the
A.
B.
C.
D.
45.  Binary (double) stars can be detected by
A.
B.
C.
D.
E.
46.  Magnetic field is continuously produced and deformed in the Sun by    
A.
B.
C.
D.
47.  The light we see from the Sun comes from which layer?    
A.
B.
C.
D.
48.  Star E is the same temperature as star F but is four times as luminous. Which star is bigger?    
A.
B.
C.
D.
49.  Which type of binaries are found via Doppler shifts?    
A.
B.
C.
D.
E.
50.  What is the difference between brightness and luminosity?
A.
B.
C.
D.
51.  What is the net result of the proton-proton chain?
A.
B.
C.
D.
52.  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.
53.  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.
54.  Parallax would be easier to measure if    
A.
B.
C.
D.
E.
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