Chapter 2 quiz_ ASTRON 001 _ Elementary Astronomy - Kiley D. - FALL 2023 - SECTION# 14762
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Los Angeles City College *
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Course
001
Subject
Astronomy
Date
Dec 6, 2023
Type
Pages
5
Uploaded by bobbygomez30
11/2/23, 11:11 AM
Chapter 2 quiz: ASTRON 001 : Elementary Astronomy - Kiley D. - FALL 2023 - SECTION# 14762
https://ilearn.laccd.edu/courses/242104/quizzes/1840555
1/5
Chapter 2 quiz
Due
Dec 16 at 11:59pm
Points
10
Questions
10
Available
Aug 28 at 8am - Dec 18 at 11:59pm
Time Limit
None
Allowed Attempts
Unlimited
Instructions
Score for this attempt:
10
out of 10
Submitted Sep 8 at 12:12pm
This attempt took 4 minutes.
This is the Chapter 2 quiz. You have two attempts to answer these questions, and your highest score will
be recorded!
Take the Quiz Again
1 / 1 pts
Question 1
An electron moves to a higher energy level in an atom after absorbing a
photon of a specific frequency.
True
Correct!
Correct!
False
1 / 1 pts
Question 2
11/2/23, 11:11 AM
Chapter 2 quiz: ASTRON 001 : Elementary Astronomy - Kiley D. - FALL 2023 - SECTION# 14762
https://ilearn.laccd.edu/courses/242104/quizzes/1840555
2/5
The blackbody emission spectrum of object A peaks in the ultraviolet region
of the electromagnetic spectrum at a wavelength of 240 nm. That of object B
peaks in the red region, at 670 nm. This means that Object B is hotter.
True
False
Correct!
Correct!
1 / 1 pts
Question 3
Which of the following is true regarding the speed of light?
The speed in space varies with wavelength.
The speed of light increases when it travels through matter.
It is constant for all electromagnetic waves traveling in a vacuum.
Correct!
Correct!
Its value is 300,000 kilometers per hour.
1 / 1 pts
Question 4
Which of these is
not
a form of electromagnetic radiation?
ultraviolet light causing a suntan.
DC current from your car's battery.
Correct!
Correct!
X-rays in the doctor's office.
radio signals.
light from your camp fire.
11/2/23, 11:11 AM
Chapter 2 quiz: ASTRON 001 : Elementary Astronomy - Kiley D. - FALL 2023 - SECTION# 14762
https://ilearn.laccd.edu/courses/242104/quizzes/1840555
3/5
1 / 1 pts
Question 5
Which of the following photons is most energetic?
Ultraviolet.
Visible.
Infrared.
X-Ray.
Gamma-ray.
Correct!
Correct!
1 / 1 pts
Question 6
A blue star has a higher surface temperature than a red star.
True
Correct!
Correct!
False
1 / 1 pts
Question 7
The total energy radiated by a blackbody depends on
the fourth power of its temperature.
Correct!
Correct!
the square root of its temperature.
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11/2/23, 11:11 AM
Chapter 2 quiz: ASTRON 001 : Elementary Astronomy - Kiley D. - FALL 2023 - SECTION# 14762
https://ilearn.laccd.edu/courses/242104/quizzes/1840555
4/5
the square of its temperature.
the cube of its temperature.
the fourth root of its temperature.
1 / 1 pts
Question 8
Increasing the temperature of a blackbody by a factor of 3 will increase its
energy by a factor of
81.
Correct!
Correct!
12.
100.
3.
6.
1 / 1 pts
Question 9
In Bohr's model of the atom, electrons
only make transitions between orbits of specific energies.
Correct!
Correct!
are spread uniformly through a large, positive mass.
move from one orbit in many small steps.
are not confined to specific orbits.
can be halfway between orbits.
11/2/23, 11:11 AM
Chapter 2 quiz: ASTRON 001 : Elementary Astronomy - Kiley D. - FALL 2023 - SECTION# 14762
https://ilearn.laccd.edu/courses/242104/quizzes/1840555
5/5
1 / 1 pts
Question 10
The observed spectral lines of a star are all shifted towards the red end of
the spectrum. Which statement is true?
The second law of Kirchhoff explains this.
The star has a radial velocity toward us.
The star is not rotating.
This is an example of the Doppler effect.
Correct!
Correct!
This is an example of the photoelectric effect.
Quiz Score:
10
out of 10