Question 1

Why is UV astronomy difficult to do from the ground?

Accepted Answer

The atmosphere blocks most of the UV waves before they reach the ground. In order tosee a wide range of UV wavelengths, you have to get very high in the atmosphere, such as with aballoon observatory, or above the atmosphere.

Question 2

In addition to visible light, Hubble can do some work in the infrared and ultraviolet portionsof the spectrum.

Accepted Answer

A) True 
 B)False  True

Question 3

In which part of the electromagnetic spectrum have astronomers been unable to get anyinformation?

Accepted Answer

A) gamma rays 
B) X-rays 
C) ultraviolet 
D) microwaves 
E) We now can access information in all spectral lengths. 
A) gamma rays 
B) X-rays 
C) ultraviolet 
D) microwaves 
E) We now can access information in all spectral lengths. E

Question 4

The design of modern X-ray telescopes depends on:

Accepted Answer

A) lenses made of germanium. 
B) the prime focus design, with mirrors made of iron. 
C) grazing incidence optics. 
D) achromatic lenses to keep the X-rays in focus. 
E) the Cassegrain design, with mirrors made of lead. 
A) lenses made of germanium. 
B) the prime focus design, with mirrors made of iron. 
C) grazing incidence optics. 
D) achromatic lenses to keep the X-rays in focus. 
E) the Cassegrain design, with mirrors made of lead.

Question 5

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 6

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 7

The Schmidt corrector plate largely cures spherical aberration, giving a wide, flat field ofview.

Accepted Answer

A) True 
 B)False

Question 8

Which of the following telescopes observes the highest energy photons?

Accepted Answer

A) Hubble 
B) Chandra 
C) Fermi 
D) James Webb 
E) ALMA 
A) Hubble 
B) Chandra 
C) Fermi 
D) James Webb 
E) ALMA

Question 9

This design combines the radiation from two different telescopes to greatly enhanceresolution via computer synthesis.

Accepted Answer

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

Question 10

How does the placement of the eyepiece with Newtonian and Cassegrain reflectors differ?

Accepted Answer

In the Newtonian, the eyepiece

Question 11

Why is the angular resolution of radio telescopes much worse than that of smaller opticaltelescopes?

Accepted Answer

Radio waves are much longer in

Question 12

One advantage of the Hubble Space Telescope over ground-based ones is that:

Accepted Answer

A) it is larger than any Earth-based scopes. 
B) it can better focus X-ray images. 
C) it can make better observations of the ozone layer. 
D) its adaptive optics controls atmospheric blurring better. 
E) in orbit, it can operate close to its diffraction limit at visible wavelengths. 
A) it is larger than any Earth-based scopes. 
B) it can better focus X-ray images. 
C) it can make better observations of the ozone layer. 
D) its adaptive optics controls atmospheric blurring better. 
E) in orbit, it can operate close to its diffraction limit at visible wavelengths.

Question 13

Absorption of light passing through the glass is a bigger problem for Cassegrain reflectorsthan achromatic refractors.

Accepted Answer

A) True 
 B)False

Question 14

A telescope with a 60 mm objective lens collects how many times as much light as does youreye'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 15

The light gathering ability of a telescope is most dependent on the diameter of its primaryobjective.

Accepted Answer

A) True 
 B)False

Question 16

Optical interferometry is more in use than radio interferometry.

Accepted Answer

A) True 
 B)False

Question 17

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

Accepted Answer

The resolution would now be tw

Question 18

How do radio interferometers greatly enhance resolution in radio wavelengths?

Accepted Answer

Hooking two or more radio dish

Question 19

Which type of telescope has the simplest light path?

Accepted Answer

A) prime focus reflector 
B) single lens refractor 
C) achromatic refractor 
D) Newtonian reflector 
E) Cassegrain reflector 
A) prime focus reflector 
B) single lens refractor 
C) achromatic refractor 
D) Newtonian reflector 
E) Cassegrain reflector

Question 20

Hubble Space Telescope is still the largest scope ever built.

Accepted Answer

A) True 
 B)False

Exam 5: Telescopes: The Tools of Astronomy

Why is UV astronomy difficult to do from the ground?

In addition to visible light, Hubble can do some work in the infrared and ultraviolet portionsof the spectrum.

In which part of the electromagnetic spectrum have astronomers been unable to get anyinformation?

The design of modern X-ray telescopes depends on:

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

Which of these devices helps correct coma in fast reflectors?

The Schmidt corrector plate largely cures spherical aberration, giving a wide, flat field ofview.

Which of the following telescopes observes the highest energy photons?

This design combines the radiation from two different telescopes to greatly enhanceresolution via computer synthesis.

How does the placement of the eyepiece with Newtonian and Cassegrain reflectors differ?

Why is the angular resolution of radio telescopes much worse than that of smaller opticaltelescopes?

One advantage of the Hubble Space Telescope over ground-based ones is that:

Absorption of light passing through the glass is a bigger problem for Cassegrain reflectorsthan achromatic refractors.

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

The light gathering ability of a telescope is most dependent on the diameter of its primaryobjective.

Optical interferometry is more in use than radio interferometry.

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

How do radio interferometers greatly enhance resolution in radio wavelengths?

Which type of telescope has the simplest light path?

Hubble Space Telescope is still the largest scope ever built.

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: Earths 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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