A photographic plate - Marvel Education

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Practice Listening: Highlight Correct Summary ID: #47323 Medium A photographic plate

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Transcript:

Most people think of astronomers as people who spend their time in cold observatories peering through telescopes every night. In fact, a typical astronomer spends most of his or her time analyzing data and may only be at the telescope a few weeks of the year. Some astronomers work on purely theoretical problems and never use a telescope at all. You might not know how rarely images are viewed directly through telescopes. The most common way to observe the skies is to photograph them. The process is very simple. First, a photographic plate is coated with a light-sensitive material. The plate is positioned so that the image received by the telescope is recorded on it. Then the image can be developed, enlarged, and published so that many people can study it. Because most astronomical objects are very remote, the light we receive from them is rather feeble. But by using a telescope as a camera, long-time exposures can be made. In this way, objects can be photographed that are a hundred times too faint to be seen by just looking through a telescope.

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A photographic plate is coated with a light-sensitive material. The plate is positioned so that the image received by the telescope is recorded on it. And the astronomer develops it. Objects can be photographed that are a hundred times too faint to be seen by just looking through a telescope. And so astronomers use telescope all the time. Because most astronomical objects are very remote, the light we receive from them is rather feeble. But by using a telescope as a camera, long time exposures can be made. Thus for astronomers telescopes are vital. A typical astronomer spends most of his or her time analyzing data and may only be at the telescope a few weeks of the year. Some astronomers work on purely theoretical problems and do not use a telescope at all.

Result:

A.I. Explanation:

Option 1: "A photographic plate is coated with a light-sensitive material. The plate is positioned so that the image received by the telescope is recorded on it. And the astronomer develops it."
Explanation: This option focuses solely on the process of using a photographic plate and does not capture the main idea of the text, which emphasizes the overall role of astronomers and their limited use of telescopes. It presents a specific detail but lacks the broader context of how astronomers primarily analyze data.
Option 2: "Objects can be photographed that are a hundred times too faint to be seen by just looking through a telescope. And so astronomers use telescope all the time."
Explanation: While this option mentions the faintness of astronomical objects, it incorrectly states that astronomers use telescopes all the time. The text clarifies that astronomers spend most of their time analyzing data and may only use telescopes occasionally, making this option misleading.
Option 3: "Because most astronomical objects are very remote, the light we receive from them is rather feeble. But by using a telescope as a camera, long time exposures can be made. Thus for astronomers telescopes are vital."
Explanation: This option highlights the importance of telescopes for photographing faint objects but misrepresents the text's main point. The text indicates that many astronomers do not rely on telescopes at all, as they often work with data analysis or theoretical problems, making this option too narrow and not representative of the overall message.
Option 4: "A typical astronomer spends most of his or her time analyzing data and may only be at the telescope a few weeks of the year. Some astronomers work on purely theoretical problems and do not use a telescope at all."
Explanation: This option accurately summarizes the main idea of the text, which states that astronomers primarily analyze data rather than spend all their time at telescopes. It captures the essence of the text by mentioning that some astronomers do not use telescopes at all, reflecting the diversity of their work.

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Student #AE85 ⭐ Top 2 months ago 1/1

A typical astronomer spends most of his or her time analyzing data and may only be at the telescope a few weeks of the year. Some astronomers work on purely theoretical problems and do not use a telescope at all.

Student #A2F3 3 months ago 0/1

A photographic plate is coated with a light-sensitive material. The plate is positioned so that the image received by the telescope is recorded on it. And the astronomer develops it.

Student #2B13 3 months ago 0/1

Objects can be photographed that are a hundred times too faint to be seen by just looking through a telescope. And so astronomers use telescope all the time.

Student #C44B 3 months ago 0/1

Because most astronomical objects are very remote, the light we receive from them is rather feeble. But by using a telescope as a camera, long time exposures can be made. Thus for astronomers telescopes are vital.

Student #A4D8 4 months ago 0/1

Student #117C 5 months ago 1/1

Student #AF58 7 months ago 1/1

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