Astronomy Chapter 5 Written Exam Questions & Answers.
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Course
Astronomy
Institution
Astronomy
Astronomy Chapter 5 Written Exam Questions & Answers.
Suppose you know the frequency of a photon and the speed of light. What else can you determine about the photon? - CORRECT ANSWER its wavelength and energy
Which of the following best describes the fundamental difference between two differ...
Astronomy Chapter 5 Written Exam
Questions & Answers.
Suppose you know the frequency of a photon and the speed of light. What else can you determine
about the photon? - CORRECT ANSWER its wavelength and energy
Which of the following best describes the fundamental difference between two different chemical
elements (such as oxygen and carbon)? - CORRECT ANSWER They have different numbers of protons in
their nucleus.
The spectra of most galaxies show redshifts. This means that their spectral lines _________. - CORRECT
ANSWER have wavelengths that are longer than normal
If we say that a material is opaque to ultraviolet light, we mean that it _________. - CORRECT ANSWER
absorbs ultraviolet light
Suppose you look at a spectrum of visible light by looking through a prism or diffraction grating. How can
you decide whether it is an emission line spectrum or an absorption line spectrum? - CORRECT ANSWER
An emission line spectrum consists of bright lines on a dark background, while an absorption line
spectrum consists of dark lines on a rainbow background.
Thermal radiation is defined as _________. - CORRECT ANSWER radiation with a spectrum whose shape
depends only on the temperature of the emitting object
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.
Suppose you want to know the chemical composition of a distant star. Which piece of information is
most useful to you? - CORRECT ANSWER the wavelengths of spectral lines in the star's spectrum
Blue light has higher frequency than red light. Thus, blue light has: - CORRECT ANSWER higher energy
and shorter wavelength than red light.
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