The following five sentences are taken from a draft of an essay about cosmological discoveries. To construct a paragraph that logically develops the claim that the discovery of the Cosmic Microwave Background (CMB) radiation supported the Big Bang theory by systematically eliminating alternative explanations and aligning empirical data with theoretical predictions, in what order should the sentences be arranged?
- 1In 1964, physicists Arno Penzias and Robert Wilson set out to use a sensitive horn antenna to analyze radio signals from the spaces between galaxies, only to be plagued by an inexplicable, constant background noise.
- 2To eliminate potential local sources of this persistent hiss, they meticulously cleaned the instrument's interior of debris—including what they famously called a 'white dielectric material' deposited by nesting pigeons—and ruled out interference from radar and urban broadcasts.
- 3Despite these efforts, the static remained completely isotropic, maintaining a uniform intensity of approximately 3.5 Kelvin regardless of the direction they pointed the antenna or the time of day.
- 4This constant temperature matched the predicted residual thermal signature of a hot, dense early universe that had expanded and cooled over billions of years, a concept proposed by proponents of the Big Bang model.
- 5By confirming this omnipresent radiation echo, Penzias and Wilson provided the vital empirical evidence that ultimately convinced the scientific community to reject the competing steady-state model of the universe.
Cevap
The correct sequence begins with the introduction of Penzias and Wilson's research and the unexpected noise (sentence_II), followed by the sentence describing the efforts to clean the antenna (sentence_IV), followed by the sentence stating that the noise persisted at 3.5 Kelvin (sentence_I), followed by the sentence linking this temperature to the Big Bang model (sentence_V), and ending with the sentence concluding that this evidence disproved the steady-state model (sentence_III).
The correct sequence begins with the sentence introducing Penzias and Wilson's research and the unexpected noise. It logically proceeds to the systematic efforts to eliminate local noise, followed by the observation that the noise persisted uniformly at a specific temperature. This temperature is then connected to the Big Bang theory's predictions, concluding with the historical impact of this evidence on cosmological models.
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Anahtar Kavram
Supporting Claims with Evidence and Details