Astronomy Chapter 5 Written Exam Questions & Answers.
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Course
Astronomy
Institution
Astronomy
Astronomy Chapter 5 Written Exam Questions & Answers.
Suppose you see two stars: a blue star and a red star. Which of the following can you conclude about the two stars? Assume that no Doppler shifts are involved. (Hint: Think about the laws of thermal radiation.) - CORRECT ANSWER The blue star ...
Astronomy Chapter 5 Written Exam
Questions & Answers.
Suppose you see two stars: a blue star and a red star. Which of the following can you conclude about
the two stars? Assume that no Doppler shifts are involved. (Hint: Think about the laws of thermal
radiation.) - CORRECT ANSWER The blue star has a hotter surface temperature than the red star.
From lowest energy to highest energy, which of the following correctly orders the different categories of
electromagnetic radiation? - CORRECT ANSWER radio, infrared, visible light, ultraviolet, X-rays, gamma
rays
The stars in our sky twinkle in brightness and color because of - CORRECT ANSWER turbulence in the
Earth's atmosphere
We are measuring the spectra of two hydrogen gas clouds. The laboratory frame wavelength of one
hydrogen line is 656.2 nm. Cloud A's emission line wavelength is 660.1 nm and Cloud B's emission line
wavelength is 670.1 nm. What can we conclude about these clouds? - CORRECT ANSWER They are both
receding from us, and Cloud B is receding faster than Cloud A.
Suppose you watch a leaf bobbing up and down as ripples pass it by in a pond. You notice that it does
two full up and down bobs each second. Which statement is true of the ripples on the pond? - CORRECT
ANSWER They have a frequency of 2 hertz.
Which of the following best describes why we say that light is an electromagnetic wave? - CORRECT
ANSWER The passage of a light wave can cause electrically charged particles to move up and down.
Which of the following statements about X rays and radio waves is not true? - CORRECT ANSWER X rays
travel through space faster than radio waves.
Each of the following describes an "Atom 1" and an "Atom 2." In which case are the two atoms different
isotopes of the same element? - CORRECT ANSWER Atom 1: nucleus with 7 protons and 8 neutrons,
surrounded by 7 electrons; Atom 2: nucleus with 7 protons and 7 neutrons, surrounded by 7 electrons
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