Question 1

The Kelvin scale measures

Accepted Answer

A)  temperature referenced to zero at the freezing point of water. 
B)  mass per unit volume,or density,with water having a value of 1.0. 
C)  temperature in Fahrenheit-sized degrees above absolute zero. 
D)  temperature in Celsius-sized degrees above absolute zero. 
A)  temperature referenced to zero at the freezing point of water. 
B)  mass per unit volume,or density,with water having a value of 1.0. 
C)  temperature in Fahrenheit-sized degrees above absolute zero. 
D)  temperature in Celsius-sized degrees above absolute zero.

Question 2

The main reason for placing astronomical telescopes and detectors on satellites is to

Accepted Answer

A)  avoid dust and haze in Earth's atmosphere. 
B)  avoid light pollution from cities and other built-up areas. 
C)  get closer to the objects being viewed. 
D)  get above the absorption in Earth's atmosphere. 
A)  avoid dust and haze in Earth's atmosphere. 
B)  avoid light pollution from cities and other built-up areas. 
C)  get closer to the objects being viewed. 
D)  get above the absorption in Earth's atmosphere.

Question 3

Electrons can jump only to specific orbits with certain energy levels within atoms.

Accepted Answer

A) True 
 B)False

Question 4

What was Galileo's method for trying to determine the speed of light?

Accepted Answer

Galileo and an assistant stood at night

Question 5

According to the Doppler effect,

Accepted Answer

A)  the wavelength of light is shifted to a shorter wavelength if the source of light is moving toward you. 
B)  the wavelength of light is shifted to a longer wavelength if the source of the light is moving toward you. 
C)  the wavelength of peak emission of light from a source changes as the temperature of the source changes. 
D)  spectral lines are split into two or more wavelengths when the source of the light is in a strong magnetic field. 
A)  the wavelength of light is shifted to a shorter wavelength if the source of light is moving toward you. 
B)  the wavelength of light is shifted to a longer wavelength if the source of the light is moving toward you. 
C)  the wavelength of peak emission of light from a source changes as the temperature of the source changes. 
D)  spectral lines are split into two or more wavelengths when the source of the light is in a strong magnetic field.

Question 6

For a telescope in space,above the distortion due to Earth's atmosphere,the angular resolution of the telescope

Accepted Answer

A)  is better (can see finer detail)in blue light than in red light. 
B)  is better (can see finer detail)in red light than in blue light. 
C)  is the same for all wavelengths of light. 
D)  cannot be determined from the information given. 
A)  is better (can see finer detail)in blue light than in red light. 
B)  is better (can see finer detail)in red light than in blue light. 
C)  is the same for all wavelengths of light. 
D)  cannot be determined from the information given.

Question 7

As the frequency of light increases,the wavelength of light also increases.

Accepted Answer

A) True 
 B)False

Question 8

The Doppler effect is an important tool in astronomy because it uncovers basic information about the temperature of objects in space.

Accepted Answer

A) True 
 B)False

Question 9

The chemical makeup of a star's surface is obtained by

Accepted Answer

A)  measuring the chemical elements present in the stellar wind. 
B)  theoretical methods,considering the evolution of the star. 
C)  taking a sample of the surface with a space probe. 
D)  spectroscopy of the light emitted by the star. 
A)  measuring the chemical elements present in the stellar wind. 
B)  theoretical methods,considering the evolution of the star. 
C)  taking a sample of the surface with a space probe. 
D)  spectroscopy of the light emitted by the star.

Question 10

Which of the following is an electromagnetic wave?

Accepted Answer

A)  Microwave 
B)  Gravitational wave 
C)  Cosmic-ray proton 
D)  Sound wave 
A)  Microwave 
B)  Gravitational wave 
C)  Cosmic-ray proton 
D)  Sound wave

Question 11

The successor of the Hubble Space Telescope is the James Webb Space Telescope.

Accepted Answer

A) True 
 B)False

Question 12

In many instances,the detector that has replaced the photographic plate for astronomical photography is the

Accepted Answer

A)  diffraction grating. 
B)  CCD (charge-coupled device). 
C)  interferometer. 
D)  PMT (photomultiplier tube). 
A)  diffraction grating. 
B)  CCD (charge-coupled device). 
C)  interferometer. 
D)  PMT (photomultiplier tube).

Question 13

The first reliable method developed to measure the speed of light involved

Accepted Answer

A)  careful observation of the motions of the moons of Jupiter at different times in Jupiter's orbit. 
B)  observing the opening and closing of shutters on lanterns on hilltops separated by a known distance. 
C)  bouncing a beam of light off several different mirrors. 
D)  making careful measurements of the orbital path of the Moon around Earth. 
A)  careful observation of the motions of the moons of Jupiter at different times in Jupiter's orbit. 
B)  observing the opening and closing of shutters on lanterns on hilltops separated by a known distance. 
C)  bouncing a beam of light off several different mirrors. 
D)  making careful measurements of the orbital path of the Moon around Earth.

Question 14

How much more light will be collected by the optics of one side of a pair of binoculars (7 × 50,with magnification of 7 and an objective lens aperture diameter of 50 mm)compared to that collected by an average human eye with a typical aperture diameter of 5 mm?

Accepted Answer

A)  10 
B)  2500 
C)  100 
D)  1.4,or 7/5 
A)  10 
B)  2500 
C)  100 
D)  1.4,or 7/5

Question 15

In terms of wavelengths,gamma rays are

Accepted Answer

A)  the shortest wavelength electromagnetic waves. 
B)  intermediate between radio and infrared waves. 
C)  intermediate between X-rays and ultraviolet waves. 
D)  the longest wavelength electromagnetic waves. 
A)  the shortest wavelength electromagnetic waves. 
B)  intermediate between radio and infrared waves. 
C)  intermediate between X-rays and ultraviolet waves. 
D)  the longest wavelength electromagnetic waves.

Question 16

The spectrum of a star shows an equivalent set of dark absorption lines to those of the Sun,with one exception: Every line appears at a slightly longer wavelength,shifted toward the red end of the spectrum.What conclusion can be drawn from this observation?

Accepted Answer

A)  The star is moving rapidly toward Earth. 
B)  A cloud of dust surrounds the star and absorbs the light. 
C)  The star is moving rapidly away from Earth. 
D)  The temperature of the star's surface is higher than that of the Sun. 
A)  The star is moving rapidly toward Earth. 
B)  A cloud of dust surrounds the star and absorbs the light. 
C)  The star is moving rapidly away from Earth. 
D)  The temperature of the star's surface is higher than that of the Sun.

Question 17

Why was adaptive optics developed?

Accepted Answer

A)  To prevent distortion of mirrors by the vacuum of space 
B)  To prevent distortion by sagging in very thin,lightweight mirrors 
C)  To compensate for spherical aberration 
D)  To compensate for image distortion caused by Earth's atmosphere 
A)  To prevent distortion of mirrors by the vacuum of space 
B)  To prevent distortion by sagging in very thin,lightweight mirrors 
C)  To compensate for spherical aberration 
D)  To compensate for image distortion caused by Earth's atmosphere

Question 18

A particular reflecting telescope has an objective mirror with a focal length of 1.2 m and an eyepiece lens of focal length 6 mm.What is the magnifying power of this telescope?

Accepted Answer

A)  5× 
B)  2000× 
C)  20× 
D)  200× 
A)  5× 
B)  2000× 
C)  20× 
D)  200×

Question 19

How is the spectrum of a bright-line emission spectrum changed from a cloud of interstellar gas that is moving away as opposed to a stationary one relative to us?

Accepted Answer

A)  The bright lines will be shifted toward the blue part of the spectrum. 
B)  The emission spectrum would be turned into an absorption spectrum. 
C)  The bright lines will be shifted toward the red part of the spectrum. 
D)  Some bright lines would shift toward the red part of the spectrum and some would shift toward the blue part of the spectrum. 
A)  The bright lines will be shifted toward the blue part of the spectrum. 
B)  The emission spectrum would be turned into an absorption spectrum. 
C)  The bright lines will be shifted toward the red part of the spectrum. 
D)  Some bright lines would shift toward the red part of the spectrum and some would shift toward the blue part of the spectrum.

Question 20

What changes would you expect to see in the resulting spectrum of emitted light from a piece of metal when it is heated slowly in an intense flame from 500 K to 1500 K?

Accepted Answer

A)  The intensity of radiation would decrease and the color would remain the same. 
B)  The intensity of radiation would increase and its color would change from red through orange toward yellow. 
C)  The intensity of radiation would increase,and the color would remain the same. 
D)  The intensity of radiation would remain constant,while the color would change from yellow to orange and red. 
A)  The intensity of radiation would decrease and the color would remain the same. 
B)  The intensity of radiation would increase and its color would change from red through orange toward yellow. 
C)  The intensity of radiation would increase,and the color would remain the same. 
D)  The intensity of radiation would remain constant,while the color would change from yellow to orange and red.

The Kelvin scale measures

The main reason for placing astronomical telescopes and detectors on satellites is to

Electrons can jump only to specific orbits with certain energy levels within atoms.

What was Galileo's method for trying to determine the speed of light?

According to the Doppler effect,

For a telescope in space,above the distortion due to Earth's atmosphere,the angular resolution of the telescope

As the frequency of light increases,the wavelength of light also increases.

The Doppler effect is an important tool in astronomy because it uncovers basic information about the temperature of objects in space.

The chemical makeup of a star's surface is obtained by

Which of the following is an electromagnetic wave?

The successor of the Hubble Space Telescope is the James Webb Space Telescope.

In many instances,the detector that has replaced the photographic plate for astronomical photography is the

The first reliable method developed to measure the speed of light involved

How much more light will be collected by the optics of one side of a pair of binoculars (7 × 50,with magnification of 7 and an objective lens aperture diameter of 50 mm)compared to that collected by an average human eye with a typical aperture diameter of 5 mm?

In terms of wavelengths,gamma rays are

The spectrum of a star shows an equivalent set of dark absorption lines to those of the Sun,with one exception: Every line appears at a slightly longer wavelength,shifted toward the red end of the spectrum.What conclusion can be drawn from this observation?

Why was adaptive optics developed?

A particular reflecting telescope has an objective mirror with a focal length of 1.2 m and an eyepiece lens of focal length 6 mm.What is the magnifying power of this telescope?

How is the spectrum of a bright-line emission spectrum changed from a cloud of interstellar gas that is moving away as opposed to a stationary one relative to us?

What changes would you expect to see in the resulting spectrum of emitted light from a piece of metal when it is heated slowly in an intense flame from 500 K to 1500 K?

Predicting the Motions of the Stars, Sun, and Moon

Analyzing Scales and Motions of the Universe

Exploring Our Evolving Solar System

Uncovering Earths Systems

Exploring Terrestrial Surface Processes and Atmospheres

Observing the Dynamic Giant Planets

Looking for Life Beyond Earth

Probing the Dynamic Sun

Observing Properties of Distant Stars

Inferring Patterns in Star Life Cycles

Predicting the Violent End of the Largest Stars

Exploring Our Galaxy

Investigating Other Galaxies

Observing the Evolution of the Universe

Filters

Exam 2: Decoding the Hidden Messages in Starlight

The Kelvin scale measures

The main reason for placing astronomical telescopes and detectors on satellites is to

Electrons can jump only to specific orbits with certain energy levels within atoms.

What was Galileo's method for trying to determine the speed of light?

According to the Doppler effect,

For a telescope in space,above the distortion due to Earth's atmosphere,the angular resolution of the telescope

As the frequency of light increases,the wavelength of light also increases.

The Doppler effect is an important tool in astronomy because it uncovers basic information about the temperature of objects in space.

The chemical makeup of a star's surface is obtained by

Which of the following is an electromagnetic wave?

The successor of the Hubble Space Telescope is the James Webb Space Telescope.

In many instances,the detector that has replaced the photographic plate for astronomical photography is the

The first reliable method developed to measure the speed of light involved

How much more light will be collected by the optics of one side of a pair of binoculars (7 × 50,with magnification of 7 and an objective lens aperture diameter of 50 mm)compared to that collected by an average human eye with a typical aperture diameter of 5 mm?

In terms of wavelengths,gamma rays are

The spectrum of a star shows an equivalent set of dark absorption lines to those of the Sun,with one exception: Every line appears at a slightly longer wavelength,shifted toward the red end of the spectrum.What conclusion can be drawn from this observation?

Why was adaptive optics developed?

A particular reflecting telescope has an objective mirror with a focal length of 1.2 m and an eyepiece lens of focal length 6 mm.What is the magnifying power of this telescope?

How is the spectrum of a bright-line emission spectrum changed from a cloud of interstellar gas that is moving away as opposed to a stationary one relative to us?

What changes would you expect to see in the resulting spectrum of emitted light from a piece of metal when it is heated slowly in an intense flame from 500 K to 1500 K?

Predicting the Motions of the Stars, Sun, and Moon

Analyzing Scales and Motions of the Universe

Exploring Our Evolving Solar System

Uncovering Earths Systems

Exploring Terrestrial Surface Processes and Atmospheres

Observing the Dynamic Giant Planets

Looking for Life Beyond Earth

Probing the Dynamic Sun

Observing Properties of Distant Stars

Inferring Patterns in Star Life Cycles

Predicting the Violent End of the Largest Stars

Exploring Our Galaxy

Investigating Other Galaxies

Observing the Evolution of the Universe

Filters