Question 1

What is the sequence of star colours in order of increasing temperature?

Accepted Answer

A) red, yellow, blue 
B) red, blue, yellow 
C) yellow, red, blue 
D) blue, yellow, red 
A) red, yellow, blue 
B) red, blue, yellow 
C) yellow, red, blue 
D) blue, yellow, red

Question 2

The Sun emits its maximum intensity of light at about 520 nm.According to Wien's Law,what would the temperature of a star that emits its maximum intensity at 10⁴0 nm be?

Accepted Answer

A) 1040 K 
B) 2900 K 
C) 5800 K 
D) 10400 K 
A) 1040 K 
B) 2900 K 
C) 5800 K 
D) 10400 K

Question 3

The energy of the first level in an atom is 2.2×10⁻¹⁸ J,and the energy of the second energy level is 1.6×10⁻¹⁸ J.What is the energy of the photon that is emitted if an electron moves from the second level to the first?

Accepted Answer

A) 3.5×10⁻³⁶ J 
B) 6.0×10⁻¹⁹ J 
C) 3.5×10⁻¹⁸ J 
D) 6.0 ×10⁻¹⁸ J 
A) 3.5×10⁻³⁶ J 
B) 6.0×10⁻¹⁹ J 
C) 3.5×10⁻¹⁸ J 
D) 6.0 ×10⁻¹⁸ J

Question 4

The Doppler effect means that the motion of a object affects the light emitted from it.What result does the Doppler effect cause?

Accepted Answer

A) It shifts the wavelength of spectral lines. 
B) It changes the speed of light emitted from the object. 
C) It makes the object appear hotter. 
D) It makes the object appear cooler. 
A) It shifts the wavelength of spectral lines. 
B) It changes the speed of light emitted from the object. 
C) It makes the object appear hotter. 
D) It makes the object appear cooler.

Question 5

How do we know that sunspots are magnetic phenomena?

Accepted Answer

A) Doppler shifts in spectral lines are observed. 
B) The Zeeman effect is observed in sunspots. 
C) Collisional broadening is observed in spectral lines. 
D) Infrared observations indicate that the sunspots are cooler than their surroundings. 
A) Doppler shifts in spectral lines are observed. 
B) The Zeeman effect is observed in sunspots. 
C) Collisional broadening is observed in spectral lines. 
D) Infrared observations indicate that the sunspots are cooler than their surroundings.

Question 6

Where are spicules most easily visible?

Accepted Answer

A) at the solar equator, in the lowest levels of the photosphere 
B) at the centres of sunspots 
C) in the corona near the north and south poles of the Sun during a total solar eclipse 
D) in filtergrams of the solar chromosphere 
A) at the solar equator, in the lowest levels of the photosphere 
B) at the centres of sunspots 
C) in the corona near the north and south poles of the Sun during a total solar eclipse 
D) in filtergrams of the solar chromosphere

Question 7

-The diagram shows a plot of the temperature of the Sun as a function of distance above the bottom of the photosphere.At what height above the bottom of the photosphere is the temperature of the Sun the coolest?

Accepted Answer

A) 500 km 
B) 1,000 km 
C) 2,300 km 
D) 2,500 km to 4000 km 
A) 500 km 
B) 1,000 km 
C) 2,300 km 
D) 2,500 km to 4000 km

Question 8

How does the Sun's magnetic cycle affect the number,location,and polarity of sunspots?

Accepted Answer

The Sun's magnetic cycle, also known as

Question 9

What is the solar wind,and how does it affect objects in the solar system?

Accepted Answer

The answer of What is the solar wind,and how does...

Question 10

Which of the following can be determined from the spectrum of a star,without additional information?

Accepted Answer

A) distance 
B) core temperature 
C) rotational velocity 
D) velocity across the sky 
A) distance 
B) core temperature 
C) rotational velocity 
D) velocity across the sky

Question 11

-The diagram illustrates a light source,a gas cloud,and three different lines of sight the observer is located at the numbered positions).Along which line of sight would an observer see an emission spectrum?

Accepted Answer

A) 1 
B) 2 
C) 3 
A) 1 
B) 2 
C) 3

Question 12

Blue stars are hotter than red stars.

Accepted Answer

A) True 
 B)False

Question 13

When the electrons in an atom are in their lowest possible energy levels,the atom is said to be in its ____________________ state.

Accepted Answer

The answer of When the electrons in an atom are...

Question 14

Which of the following is a plausible example of a Doppler blueshift?

Accepted Answer

A) A star appears to have a much higher temperature when moving toward the Earth than when moving away. 
B) An ambulance's siren changes to a higher pitch as it speeds toward you. 
C) A star's colour becomes redder as it moves away from the Earth. 
D) A moving train's whistle shifts to a frequency so high that humans can't hear it. 
A) A star appears to have a much higher temperature when moving toward the Earth than when moving away. 
B) An ambulance's siren changes to a higher pitch as it speeds toward you. 
C) A star's colour becomes redder as it moves away from the Earth. 
D) A moving train's whistle shifts to a frequency so high that humans can't hear it.

Question 15

Why should photons emitted by a hotter gas have,on average,shorter wavelengths than photons emitted by a cooler gas?

Accepted Answer

The answer of Why should photons emitted by a hotter...

Question 16

What is (are)produced by atomic transitions in the presence of a strong magnetic field?

Accepted Answer

A) the Balmer series 
B) dynamo effects 
C) the Zeeman effect 
D) isotope ratios 
A) the Balmer series 
B) dynamo effects 
C) the Zeeman effect 
D) isotope ratios

Question 17

The ____________________ of a star can be determined from its colour.

Accepted Answer

The answer of The ____________________ of a star can be...

Question 18

In the Sun,rising currents of hot gas below the photosphere cause granulation.

Accepted Answer

A) True 
 B)False

Question 19

Explain why the presence of spectral lines of a given element in the solar spectrum tells us that element is present in the Sun,but the absence of the lines would not mean the element was absent from the Sun.

Accepted Answer

The presence of spectral lines of a give

Question 20

Sunspots often appear in pairs.

Accepted Answer

A) True 
 B)False

What is the sequence of star colours in order of increasing temperature?

The Sun emits its maximum intensity of light at about 520 nm.According to Wien's Law,what would the temperature of a star that emits its maximum intensity at 10⁴0 nm be?

The energy of the first level in an atom is 2.2×10⁻¹⁸ J,and the energy of the second energy level is 1.6×10⁻¹⁸ J.What is the energy of the photon that is emitted if an electron moves from the second level to the first?

The Doppler effect means that the motion of a object affects the light emitted from it.What result does the Doppler effect cause?

How do we know that sunspots are magnetic phenomena?

Where are spicules most easily visible?

-The diagram shows a plot of the temperature of the Sun as a function of distance above the bottom of the photosphere.At what height above the bottom of the photosphere is the temperature of the Sun the coolest?

How does the Sun's magnetic cycle affect the number,location,and polarity of sunspots?

What is the solar wind,and how does it affect objects in the solar system?

Which of the following can be determined from the spectrum of a star,without additional information?

-The diagram illustrates a light source,a gas cloud,and three different lines of sight the observer is located at the numbered positions).Along which line of sight would an observer see an emission spectrum?

Blue stars are hotter than red stars.

When the electrons in an atom are in their lowest possible energy levels,the atom is said to be in its ____________________ state.

Which of the following is a plausible example of a Doppler blueshift?

Why should photons emitted by a hotter gas have,on average,shorter wavelengths than photons emitted by a cooler gas?

What is (are)produced by atomic transitions in the presence of a strong magnetic field?

The ____________________ of a star can be determined from its colour.

In the Sun,rising currents of hot gas below the photosphere cause granulation.

Explain why the presence of spectral lines of a given element in the solar spectrum tells us that element is present in the Sun,but the absence of the lines would not mean the element was absent from the Sun.

Sunspots often appear in pairs.

The Scale of the Cosmos

User's Guide to the Sky

The Origin of Modern Astronomy

Astronomical Telescopes and Instruments

The Family of Stars

The Structure and Formation of Stars

The Deaths of Stars

The Milky Way Galaxy

Galaxies

Cosmology in the 21st Century

The Origin of the Solar System

Comparative Planetology of the Terrestrial Planets

Comparative Planetology of the Jovian Planets

Life on Other Worlds

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Exam 5: Sun Light and Sun Atoms

What is the sequence of star colours in order of increasing temperature?

The Sun emits its maximum intensity of light at about 520 nm.According to Wien's Law,what would the temperature of a star that emits its maximum intensity at 10⁴0 nm be?

The energy of the first level in an atom is 2.2×10⁻¹⁸ J,and the energy of the second energy level is 1.6×10⁻¹⁸ J.What is the energy of the photon that is emitted if an electron moves from the second level to the first?

The Doppler effect means that the motion of a object affects the light emitted from it.What result does the Doppler effect cause?

How do we know that sunspots are magnetic phenomena?

Where are spicules most easily visible?

-The diagram shows a plot of the temperature of the Sun as a function of distance above the bottom of the photosphere.At what height above the bottom of the photosphere is the temperature of the Sun the coolest?

How does the Sun's magnetic cycle affect the number,location,and polarity of sunspots?

What is the solar wind,and how does it affect objects in the solar system?

Which of the following can be determined from the spectrum of a star,without additional information?

-The diagram illustrates a light source,a gas cloud,and three different lines of sight the observer is located at the numbered positions).Along which line of sight would an observer see an emission spectrum?

Blue stars are hotter than red stars.

When the electrons in an atom are in their lowest possible energy levels,the atom is said to be in its ____________________ state.

Which of the following is a plausible example of a Doppler blueshift?

Why should photons emitted by a hotter gas have,on average,shorter wavelengths than photons emitted by a cooler gas?

What is (are)produced by atomic transitions in the presence of a strong magnetic field?

The ____________________ of a star can be determined from its colour.

In the Sun,rising currents of hot gas below the photosphere cause granulation.

Explain why the presence of spectral lines of a given element in the solar spectrum tells us that element is present in the Sun,but the absence of the lines would not mean the element was absent from the Sun.

Sunspots often appear in pairs.

The Scale of the Cosmos

User's Guide to the Sky

The Origin of Modern Astronomy

Astronomical Telescopes and Instruments

The Family of Stars

The Structure and Formation of Stars

The Deaths of Stars

The Milky Way Galaxy

Galaxies

Cosmology in the 21st Century

The Origin of the Solar System

Comparative Planetology of the Terrestrial Planets

Comparative Planetology of the Jovian Planets

Life on Other Worlds

Filters