The Cosmological Redshift of the Light from Very Distant Galaxies

question 68

Multiple Choice

The cosmological redshift of the light from very distant galaxies is caused by

• A) the expansion of space,stretching the photon's wavelength while the photon is traveling toward us.
• B) absorption of blue light by interstellar dust between us and the galaxy so that only the red wavelengths reach us.
• C) the rotation of the universe around its center (faster at greater distances from us).
• D) the Doppler shift,in which the photon's wavelength is stretched as the photon is being emitted by the galaxy's motion away from us through space.

Identify and explain the use of various decision-making models, including single-feature, additive, elimination by aspects, and availability heuristics.

Distinguish between mental set and functional fixedness, and understand how each affects problem-solving.

Explain the role of heuristics, such as the representativeness and availability heuristics, in influencing judgment.

Recognize the influence of cognitive biases, such as confirmation bias and the fallacy of positive instances, on decision-making and judgment.

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Definitions:

HBr

A corrosive, gaseous compound used in the production of inorganic and organic bromine compounds and as a catalyst in some types of chemical reactions.

Dienes

Organic compounds containing two double bonds, which may vary in their arrangements and contribute to the compound's reactivity, particularly in polymerization and Diels-Alder reactions.

Major Product

The product of a chemical reaction that is formed in the greatest quantity, as determined by the reaction conditions and mechanism.

HBr

Hydrobromic acid, a strong acid formed by dissolving hydrogen bromide in water, used in organic synthesis and as a catalyst.