Astronomy Chapter 4 and 5 Study Guide
4.5 x10^18 J/Photon
Ultraviolet radiation has a frequency of 6.8 × 1015 1/s. Calculate the energy, in joules, of the photon. E = h f where h is Planck's constant which is equal to 6.63 x10-34 joule seconds (J * s)
Large telescope have more light grasp and better resolution.
What are two advantages of large scopes over smaller ones?
an analysis of the way in which atoms absorb and emit light
What is spectroscopy?
ALMA Array
What is the name of this telescope?
Arecibo Radio Telescope
What is the name of this telescope?
Chandra
What is the name of this telescope?
Fermi Gamma Ray Telescope
What is the name of this telescope?
Hubble
What is the name of this telescope?
James Webb Telescope
What is the name of this telescope?
Keck Telescope
What is the name of this telescope?
Spitzer
What is the name of this telescope?
Very Large Array
What is the name of this telescope?
to collect a lot of light and bring it to a focus
What is the primary purpose of an astronomical telescope?
its ability to distinguish two adjacent objects close together in the sky
What is the resolution of a telescope?
They have poorer angular resolution than a refractor.
What is true of radio telescopes?
Newtonian reflector
Which design has a convex primary mirror and flat secondary mirror, with the eyepiece located on the top side of the telescope tube?
refractor
Which design is subject to chromatic aberration?
use of interferometers
Which of the following greatly improves the angular resolution of radio maps?
X-ray
Which of the following type of electromagnetic radiation has the highest energy?
radio
Which of the following type of electromagnetic radiation has the lowest energy?
a rainbow
Which of these is the classic continuous spectrum?
prime focus reflector
This telescope design involves only one optical surface, a concave mirror.
chromatic aberration
What problem do refractor telescopes have that reflectors don't?
Cassegrain
What type of telescope is the Hubble Space Telescope?
Molecules can vibrate and rotate as well.
Why are molecular lines more complex than elemental spectral lines?
a rainbow, but with some dark lines mixed in.
Typical stellar spectra appear as:
wave
Light acts like what type of phenomenon?
the elimination of chromatic aberration.
A major advantage of a Newtonian reflector over a refractor is:
Because of the larger number of electrons and corresponding energy levels, more transitions are possible.
A heavy neutral atom, such as iron, produces many spectral lines compared to light elements like hydrogen and helium. Why?
100 times
A telescope with a 60 mm objective lens collects how many times as much light as does your eye's 6 mm exit pupil?
their magnetic fields.
According to the Zeeman effect, the splitting of a sunspot's spectral lines is due to:
have a short wavelength.
According to the photoelectric effect in order to release electrons from a solid, the light incident upon it must:
atom
An emission spectrum can be used to identify a(n):
Blueshifted meaning is moving towards us
Astronomers detect an object in space and using the following Doppler shift of hydrogen (BELOW) were able to determine that the object is:
10 times
How much better resolution would a 60 mm objective lens have than your eye's 6 mm exit pupil?
A: focal length (reflector), b: eyepiece (reflector) c: to eye (reflector) d: secondary mirror (reflector), e: prime focus (reflector), f: primary mirror (reflector), g: focal length (refractor), h: focus (refractor), I: to eye (refractor) J: eyepiece (refractor)
Identify the features of the reflecting and refracting telescopes.
only make transitions between orbitals of specific energies.
In Bohr's model of the atom, electrons:
magnetic field presence, black hole and nearby planet
Line broadening of spectral lines can indicate: (check all that apply)
Alma Array: radio Hubble: infrared, optical, and ultraviolet Spitzer: infrared Very Large Telescope: infrared and optical Arecibo Telescope: radio Keck Telescope: infrared and optical James Webb Telescope: infrared Fermi Telescope: gamma-ray Chandra: X-ray Very Large Array: radio
Match each telescope with the its designed electromagnetic range. In other words what part of the electromagnetic spectrum was it designed to capture radiation in.
A: prime focus, b: newtonian focus, c: cassegrain focus, d: nasmyth/coude focus
Match the different reflecting telescope designs.
A: ground state, b: ionization, c: lyman series, d: balmer series
Match the energy states and transition series for the hydrogen atom.
A: radio, b: infrared, c: visual, d: ultraviolet, e: x-ray, f: gamma
Match the spectral regions of electromagnetic radiation in order from largest to smallest wavelengths using the provided chart below.
a: ground state b: UV Photon c: first excited state, d: visible photon, e: second excited state
Match the terms associated with atomic absorption and emission.
A: incoming light rays, b: focus, c: focal length, d: lens, e: lens axis
Match the terms associated with lenses.
A: mirror axis, b: incoming light rays, c: mirror, d: focus, e: focal length
Match the terms associated with mirrors.
radio or microwave telescopes.
Since the difference in energy between the different rotational states in a molecule is very small, many molecular lines can be observed with:
by looking at the spectral lines, the stronger and darker the spectral line the hotter the star is.
Stars are very hot, especially deep down in their cores, where temperatures can exceed millions of Kelvins. Because of the intense heat, electrons from atoms are striped off in large quantities.(Ionized). Using known spectral fingerprints, we can determine the star's temperature by
prime focus reflector
The Arecibo radio telescope is laid out like which optical telescope design?
cascade down, one orbital at a time and proceed directly back to the ground state.
The absorption of a photon by an electron can do which of the following: (Choose all that apply)
the wavelength used and the size of the main telescope objective lens or mirror.
The amount of diffraction, and thus the resolution of the scope, depends upon:
4 times
The angular resolution of an 8-inch diameter telescope is ________ greater than that of a 2-inch diameter telescope.
.02"
The best possible angular resolution of a telescope of blue light (with a wavelength of 400 nm) that can be obtained using a 5-m telescope is about?
bohr
The classical model of the hydrogen atom that explains its spectral line structure is due to:
Cassegrain reflector
The convex secondary mirror in this design focuses light down through a hole cut in the concave primary mirror.
This is an example of the Doppler effect.
The observed spectral lines of a star are all shifted towards the red end of the spectrum. Which statement is true?
reflection.
The process occurring when photons bounce off a polished surface is called:
zeeman effect
The splitting of spectral lines in the presence of strong magnetic fields is the:
refraction.
The tendency of a wave to bend as it passes from one transparent medium to another is called:
Kirchhoff.
The three laws dealing with the creation of various spectra are due to:
refracting telescope
This type of telescope uses a lens to gather and concentrate a beam of light.
