Question 1

What are some advantages of radio telescopes over optical scopes?

Accepted Answer

Radio telescopes can be used day or nigh

Question 2

Hubble Space Telescope is still the largest scope ever built.

Accepted Answer

A) True 
 B)False

Question 3

Compare how doubling the diameter of a mirror will affect both resolution and light grasp.

Accepted Answer

The resolution would now be tw

Question 4

The amount of diffraction,and thus the resolution of the scope,depends upon:

Accepted Answer

A)  the wavelength used and the size of the main telescope objective lens or mirror. 
B)  the design of the telescope. 
C)  whether the telescope is a reflector or refractor. 
D)  the brightness of the object. 
E)  the size and sensitivity of the CCD chip used for imaging. 
A)  the wavelength used and the size of the main telescope objective lens or mirror. 
B)  the design of the telescope. 
C)  whether the telescope is a reflector or refractor. 
D)  the brightness of the object. 
E)  the size and sensitivity of the CCD chip used for imaging.

Question 5

The angular resolution of an 8-inch diameter telescope is ________ greater than that of a 2-inch diameter telescope.

Accepted Answer

A)  2 times 
B)  4 times 
C)  8 times 
D)  9 times 
E)  16 times 
A)  2 times 
B)  4 times 
C)  8 times 
D)  9 times 
E)  16 times

Question 6

Very accurate measurements of stellar brightnesses and sudden changes are made with a ________.

Accepted Answer

The answer of Very accurate measurements of stellar brightnesses and...

Question 7

It is much easier to build large reflectors than large refractors.

Accepted Answer

A) True 
 B)False

Question 8

The Atacama Large Millimeter Array achieves exceptional resolution by using exceptionally:

Accepted Answer

A)  large radio antennas in a fixed array. 
B)  large radio antennas in a mobile array. 
C)  many radio antennas in a fixed array. 
D)  many radio antennas in a mobile array. 
E)  many portions of the electromagnetic spectrum. 
A)  large radio antennas in a fixed array. 
B)  large radio antennas in a mobile array. 
C)  many radio antennas in a fixed array. 
D)  many radio antennas in a mobile array. 
E)  many portions of the electromagnetic spectrum.

Question 9

Which design has a convex primary mirror and flat secondary mirror,with the eyepiece located on the top side of the telescope tube?

Accepted Answer

A)  refractor 
B)  Newtonian reflector 
C)  Cassegrain reflector 
D)  prime focus reflector 
E)  interferometer 
A)  refractor 
B)  Newtonian reflector 
C)  Cassegrain reflector 
D)  prime focus reflector 
E)  interferometer

Question 10

Which of these devices helps correct coma in fast reflectors?

Accepted Answer

A)  Cassegrain secondary mirror 
B)  star diagonal 
C)  achromatic doublet 
D)  Schmidt corrector plate 
E)  Newtonian secondary mirror 
A)  Cassegrain secondary mirror 
B)  star diagonal 
C)  achromatic doublet 
D)  Schmidt corrector plate 
E)  Newtonian secondary mirror

Question 11

A telescope with a 60 mm objective lens collects how many times as much light as does your eye's 6 mm exit pupil?

Accepted Answer

A)  5 times 
B)  10 times 
C)  25 times 
D)  100 times 
E)  250 times 
A)  5 times 
B)  10 times 
C)  25 times 
D)  100 times 
E)  250 times

Question 12

Why is it easier to travel to a remote viewing site with an 8" Cassegrain than an 8" Newtonian reflector?

Accepted Answer

The Cassegrain desig

Question 13

The ability of a telescope to separate two closely spaced stars is called ________.

Accepted Answer

The answer of The ability of a telescope to separate...

Question 14

CCD detectors gather light 10-20 times faster than the most sensitive photographic film.

Accepted Answer

A) True 
 B)False

Question 15

If the ________ is good,the atmosphere is stable,and image quality is sharp.

Accepted Answer

The answer of If the ________ is good,the atmosphere is...

Question 16

Which of the following is a problem inherent in all large radio telescopes?

Accepted Answer

A)  They are badly affected by poor seeing and atmospheric turbulence. 
B)  The lightest breeze shakes them, making the observations blurry. 
C)  Their waves are blocked by water vapor, so they must be located in deserts. 
D)  Radio waves have long wavelengths, so radio telescopes have poor resolution. 
E)  The dust clouds in the Milky Way block almost all wavelengths except light. 
A)  They are badly affected by poor seeing and atmospheric turbulence. 
B)  The lightest breeze shakes them, making the observations blurry. 
C)  Their waves are blocked by water vapor, so they must be located in deserts. 
D)  Radio waves have long wavelengths, so radio telescopes have poor resolution. 
E)  The dust clouds in the Milky Way block almost all wavelengths except light.

Question 17

Due to our ozone layer,ultraviolet astronomy must be done from space.

Accepted Answer

A) True 
 B)False

Question 18

It is diffraction that limits the ________ of a telescope of a given objective diameter.

Accepted Answer

A)  magnification 
B)  light grasp 
C)  resolution 
D)  aperture 
E)  interference 
A)  magnification 
B)  light grasp 
C)  resolution 
D)  aperture 
E)  interference

Question 19

What is the resolving power of the telescope?

Accepted Answer

A)  the ability to make distant objects appear closer 
B)  the ability to collect a lot of light 
C)  the ability to detect very faint objects 
D)  the ability to distinguish adjacent objects in the sky 
E)  the ability to separate light into its component colors 
A)  the ability to make distant objects appear closer 
B)  the ability to collect a lot of light 
C)  the ability to detect very faint objects 
D)  the ability to distinguish adjacent objects in the sky 
E)  the ability to separate light into its component colors

Question 20

The most important advantage of CCDs over film is that:

Accepted Answer

A)  they record much more light in a given exposure time. 
B)  their images do not have to be developed as film does. 
C)  they record colors better than film can. 
D)  they can cover larger areas of the sky than film can. 
E)  their images never fade, as film can. 
A)  they record much more light in a given exposure time. 
B)  their images do not have to be developed as film does. 
C)  they record colors better than film can. 
D)  they can cover larger areas of the sky than film can. 
E)  their images never fade, as film can.

Exam 5: Telescopes: The Tools of Astronomy

What are some advantages of radio telescopes over optical scopes?

Hubble Space Telescope is still the largest scope ever built.

Compare how doubling the diameter of a mirror will affect both resolution and light grasp.

The amount of diffraction,and thus the resolution of the scope,depends upon:

The angular resolution of an 8-inch diameter telescope is ________ greater than that of a 2-inch diameter telescope.

Very accurate measurements of stellar brightnesses and sudden changes are made with a ________.

It is much easier to build large reflectors than large refractors.

The Atacama Large Millimeter Array achieves exceptional resolution by using exceptionally:

Which design has a convex primary mirror and flat secondary mirror,with the eyepiece located on the top side of the telescope tube?

Which of these devices helps correct coma in fast reflectors?

A telescope with a 60 mm objective lens collects how many times as much light as does your eye's 6 mm exit pupil?

Why is it easier to travel to a remote viewing site with an 8" Cassegrain than an 8" Newtonian reflector?

The ability of a telescope to separate two closely spaced stars is called ________.

CCD detectors gather light 10-20 times faster than the most sensitive photographic film.

If the ________ is good,the atmosphere is stable,and image quality is sharp.

Which of the following is a problem inherent in all large radio telescopes?

Due to our ozone layer,ultraviolet astronomy must be done from space.

It is diffraction that limits the ________ of a telescope of a given objective diameter.

What is the resolving power of the telescope?

The most important advantage of CCDs over film is that:

Charting the Heavens: The Foundations of Astronomy

The Copernican Revolution: The Birth of Modern Science

Radiation: Information from the Cosmos

Spectroscopy: The Inner Workings of Atoms

The Solar System: Comparative Planetology and Formation Models

Earth: Our Home in Space

The Moon and Mercury: Scorched and Battered Worlds

Venus: Earth's Sister Planet

Mars: A Near Miss for Life?

Jupiter: Giant of the Solar System

Saturn: Spectacular Rings and Mysterious Moons

Uranus and Neptune: The Outer Worlds of the Solar System

Solar System Debris: Keys to Our Origin

Exoplanets: Planetary Systems Beyond Our Own

The Sun: Our Parent Star

The Stars: Giants,Dwarfs,and the Main Sequence

The Interstellar Medium: Gas and Dust among the Stars

Star Formation: A Traumatic Birth

Stellar Evolution: The Life and Death of a Star

Stellar Explosions: Novae,Supernovae,and the Formation of the Elements

Neutron Stars and Black Holes: Strange States of Matter

The Milky Way Galaxy: A Spiral in Space

Galaxies: Building Blocks of the Universe

Galaxies and Dark Matter: The Large-Scale Structure of the Cosmos

Cosmology: The Big Bang and the Fate of the Universe

The Early Universe: Toward the Beginning of Time

Life in the Universe: Are We Alone?

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