Astronomy 120 - Stars and Galaxies » Fall 2022 » Unit 3 Quiz

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Question #1
Photons with a higher frequency travel faster than those of a lower frequency.
A.   True
B.   False
Question #2
Which color of light has a shorter wavelength than blue light?
A.   red
B.   indigo
C.   yellow
D.   green
Question #3
Which of the following options correctly lists the types of EM radiation, from highest energy to lowest energy?
A.   X-rays, visible light, IR radiation
B.   visible light, gamma rays, radio waves
C.   red light, orange light, green light
D.   UV light, X-rays, gamma rays
Question #4
Which color of light has a greater energy than green light?
A.   yellow
B.   indigo
C.   red
D.   orange
Question #5
The wavelength range of visible electromagnetic radiation is
A.   4 x 10-7 - 7 x 10-7 meters
B.   2000 - 1000 kilometers
C.   410, 434, 486 and 656 nanometers
D.   0.0004 - 0.0007 meters
Question #6
Atmospheric windows…
A.   allow only certain wavelengths of light to reach the Earth's surface.
B.   are transient breaks in the cloud cover.
C.   are local phenomena, similar to the antarctic ozone hole.
D.   closed to radio light.
Question #7
Atmospheric windows completely block out radiation from reaching the ground through Earth's atmosphere.
A.   X-ray and gamma
B.   IR and UV
C.   X-ray and IR
D.   visible and radio
Question #8
Calculate the wavelength associated with KSCA (regional Mexican radio station, broadcasting out of Glendale!) that broadcasts at 101.9 MHz. (Metric conversion may be necessary). Some constants you may find useful, though you may not have to use all of them: c = 3.00 x 108 m/s h = 6.62 x 10–34 J ⋅ s
A.   2.94 x 106 m
B.   294 cm
C.   3.40 x 10-7 m
D.   0.340 m
Question #9
Calculate the energy E associated with an X-ray of wavelength λ = 0.5 nm. Some constants you may find useful, though you may not have to use all of them: c = 3.00 x 108 m/s h = 6.62 x 10–34 J ⋅ s
A.   2480 eV
B.   1 GeV
C.   620 eV
D.   15 keV
Question #10
Modern, professional astronomers prefer which type of instrument?
A.   small refractors
B.   compound microscopes
C.   large reflectors
D.   dioptric telescopes
Question #11
The resolution of a telescope can best be described as....
A.   the ability to focus an image clearly.
B.   the determination of which object to study.
C.   its ability to create digital photographs of the objects viewed.
D.   the ability to show fine details.
Question #12
The difference between your bathroom mirror and a reflecting telescope's mirror is...
A.   telescope mirrors are first plane mirrors
B.   all of these
C.   telescope mirrors are curved
D.   telescope mirror glass needn't be optically perfect
Question #13
Which of the following best describes "chromatic aberration"?
A.   A magnifying lens focusing light.
B.   A telescope focusing light to produce an image.
C.   A floodlight shining light over a wide area.
D.   A lens refracting the incoming waves of color at different angles.
Question #14
For a reflecting telescope, why is collecting light important?
A.   Light collecting isn't important actually, since the eye piece magnifies the image.
B.   Light collecting is important because it helps show the size of the planet or star.
C.   Light collecting is important, because it makes faint objects visible.
D.   Light collecting isn't important actually, since different wavelengths refract differently through a lens.
Question #15
A reflecting telescope's mirror has a base, on which a reflective coating is deposited. Modern, professional telescopes use which material for a base?
A.   concrete
B.   glass
C.   wood
D.   metal
Question #16
The photoelectric effect helped to show that
A.   light only behaves like a wave, since the photoelectric effect experiment failed.
B.   light only behaves like a particle, and not like a wave.
C.   light can behave like a particle.
D.   light behaves like a wave.
Question #17
How did the double-slit experiment help to prove the wave nature of light?
A.   The image formed on the screen showed one single bright fringe in the center of the screen.
B.   This sounds like a supernatural phenomenon... I don't think this would have happened. Like, ever.
C.   As the light traveled through the double slit, actual waves of water began to flow from the other side onto the screen.
D.   The image formed on the screen showed the same constructive and destructive interference pattern associated with waves interfering with each other.
Question #18
Who originally suggested that light was composed of small particles called "corpuscles"?
A.   Albert Einstein
B.   Sir Isaac Newton
C.   René Descartes
D.   Christiaan Huygens
Question #19
Redshifting seen in the light from distant galaxies is evidence that these galaxies are
A.   moving in a direction that is neither towards us or away from us, but to the side.
B.   moving away from us.
C.   moving towards us.
D.   not moving at all... redshifting light simply looks red.
Question #20
Light that was emitted from a star that is traveling through space towards us
A.   has a higher energy than expected
B.   shows no difference from the originally emitted light.
C.   shows a longer wavelength than expected
D.   has a lower frequency than expected

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