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Zorluk: KolayPrimary Purpose of the Whole Text

In 1964, astronomers Arno Penzias and Robert Wilson detected a persistent background noise using their horn antenna at Bell Laboratories. Initially, they suspected the interference came from terrestrial sources, urban radio interference, or even pigeon droppings inside the antenna itself. However, after systematically cleaning the instrument and eliminating all possible local disturbances, the hum remained. Parallel to their efforts, physicists at Princeton University were theorizing that the universe's creation would have left a faint, uniform thermal radiation throughout space. When Penzias and Wilson shared their findings with the Princeton team, they realized the noise was actually the cosmic microwave background radiation—the relic radiation from the Big Bang. This accidental detection provided crucial observational evidence for the Big Bang theory, transforming modern cosmology.

Which choice best states the main purpose of the text?

  1. A
    To argue that accidental discoveries are the primary driver of progress in all scientific disciplines.
  2. B
    To detail the physical cleaning methods Penzias and Wilson used to resolve their antenna's technical interference.
  3. To explain how a serendipitous observation by two astronomers provided key evidence confirming a major cosmological theory.Cevap
  4. D
    To claim that physicists at Princeton University were solely responsible for identifying the relic radiation of the universe.

Cevap

The correct answer explains how an accidental detection of background radiation by two astronomers provided critical evidence supporting the Big Bang theory.
The correct answer correctly states that the passage's primary purpose is to explain how a serendipitous observation by Penzias and Wilson provided crucial evidence confirming the Big Bang theory. The text traces the sequence of their accidental detection of the noise, their elimination of local interference, their communication with Princeton theorists, and the resulting confirmation of the relic radiation of the universe.

Adım Adım Çözüm

1
Analyze the passage to identify the main focus of the text.
The text describes how Arno Penzias and Robert Wilson accidentally detected cosmic microwave background radiation and how this discovery supported the Big Bang theory.
Understanding the overall narrative arc helps separate the primary purpose from minor details.
2
Evaluate the choices against the overall passage summary.
The option describing a serendipitous observation providing key evidence for a major cosmological theory accurately reflects the whole passage.
The main purpose must encompass the entire passage, not just a single detail or an overly broad generalization.

Anahtar Kavram

Identifying the primary purpose of a passage involves summarizing the author's main goal in writing the text as a whole.
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Konular

Primary Purpose of the Whole Text

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