Quiz #3
Astronomy 1010 with Godwin at University of Missouri- Columbia
About this deck
By: Caitlin Smith
Created: 2011-12-09
Size: 35 flashcards
Views: 46
Created: 2011-12-09
Size: 35 flashcards
Views: 46
About StudyBlue
STUDYBLUE makes things that make you better at school.
Things like online flashcards with photos and audio.
Things like personalized quizzes and friendly reminders about when (and what) to study next.
Think of it as a digital backpack™: access to all of your study materials online and on your phone.
STUDYBLUE exists to make studying efficient and effective for every student, for free. Join us.
“I have been getting MUCH better grades on all my tests for school. Flash cards, notes, and quizzes are great on here. Thanks!”
Kathy
Kathy
Sign up (free) to study this.
which of the following is constant for all types of electromagnetic waves in space
speed
grass looks green because
it reflects green light and absorbs other colors
light waves differ fundamentally from either water waves or sound waves because
they do not require a material medium
the frequency of a wave is
-the number peaks per second -measured in cps -measured in Hz -equal to the speed of the wave divided by the wavelength
when light reflects off an object, what is the relation between the angle of incidence and the angle of reflection?
angle of incidence=angle of reflection
if an object is moving towards you, what effect do you observe in the spectrum of that object
it appears blue shifted
absolute zero is
the temperature at which atoms have no remaining energy from which we can extract heat
which of the following types of visible light has the highest energy
violet
the particle which adds mass but no charge to the atomic nucleus is the
neutron
how are wavelength, freq, and energy related for photons?
longer wavelength means lower frequency, and lower energy
in comparing photons of different wavelengths, we find that the energy carried by a photon
is larger if the wavelength is shorter
from lowest energy to highest energy, which of the following correctly orders the different categories of electromagnetic radiation
radio, infrared, visible, UV light, x rays, gamma
in interaction with matter, light behaves
as both waves and particles
how can an electron in an atom lose energy to go from a higher energy level to a lower energy level
it releases a photon equal in energy to its own energy drop
when white light passes through a cool cloud of gas, we see
an absorption line spectrum
the spectra of most galaxies show redshifts. their spectral lines
have wavelengths that are longer than normal
if two photons in a vacum have different energies, what can we say about the wavelengths of these photons
the higher-energy photon has the shorter wavelength
when an electron in an atom goes from a higher energy state to a lower energy state, the atom
emits a photon of specific frequency
most of the mass of ordinary matter resides in the
nuclei of atoms
if we observe one edge of a planet to be redshifted and the opposite edge to be blueshifted, what can we conclude about the planet?
the planet is rotating
when electromagnetic radiation is doppler-shifted by motion of the source away from the detector the
detected wavelength is longer than the emitted wavelength
why are most telescope reflectors, not refractors?
large lenses deform under their own weight, while large mirrors can be supported
what is the resolving power of a telescope
its ability to distinguish two adjacent objects in the sky
what is always true about images captured with x-ray telescopes?
they are always displayed in false color
if you have double the diameter of a telescope, you will ____ the light gathering power
quadruple
which of the following has greatly improved the angular resolution of radio images?
interferometry
what is not an advantage of the hubble space telescope?
it is closer to the stars
angular resolution
the wavelength of radio waves is larger than that of visible light
how does angular resolution for a given diameter of telescope depend on wavelength
angular resolution worsens as wavelength increases
for what is an interferometer used
to improve the angular resolution of radio telescopes
what do we mean by the diffraction limit of a telescope
it is the best angular resolution the telescope could achieve with perfect optical quality and in the absence of atmospheric distortion
largest telescope diameter
10m
what is emitted from an atom when one of its electrons makes a transition from a higher energy state to a lower energy state?
photon
what does the technique of interferometry allow?
it allows two or more telescopes to obtain the angular resolution of a single telescope much larger than any of the individual telescopes
why are CCDs so useful to astronomical research?
-images are easily read and manipulated -CCDs provide a precise measurement of the spatial variation of light intensity -CCDs detect more light efficiently and dont fade
About this deck
By: Caitlin Smith
Created: 2011-12-09
Size: 35 flashcards
Views: 46
Created: 2011-12-09
Size: 35 flashcards
Views: 46
About StudyBlue
STUDYBLUE makes things that make you better at school.
Things like online flashcards with photos and audio.
Things like personalized quizzes and friendly reminders about when (and what) to study next.
Think of it as a digital backpack™: access to all of your study materials online and on your phone.
STUDYBLUE exists to make studying efficient and effective for every student, for free. Join us.
“I have been getting MUCH better grades on all my tests for school. Flash cards, notes, and quizzes are great on here. Thanks!”
Kathy
Kathy