Why do we need to send an X-ray telescope into space?

Question

BlackTom AI · Accepted Answer

Question restatement: Why do we need to send an X-ray telescope into space?

Option 1: 'An X-ray is radioactive and dangerous if observed on the ground.' This is not accurate. X-rays themselves are not inherently radioactive; the danger on Earth comes from exposure to intense X-ray radiation, but the key reason for space telescopes is not safety from radioactivity but atmospheric absorption. So this statement misrepresents the main issue.

Option 2: 'There is no pollution in space.' While space is a vacuum with no atmospheric air, pollution is not the central reason for launching a telescope into space. This answer confuses the broader context of observational clarity with a false claim about pollution, making it incorrect.

Option 3: 'The space telescope can get closer to the star and take a larger image.' In practice, we cannot get arbitrarily close to stars with X-ray telescopes due to extreme radiation, gravitational forces, and safety concerns. Proximity does not translate into better X-ray imaging in this context, and the concept overlooks how X-ray telescopes actually operate (e.g., using grazing incidence mirrors) and why space is preferred.

Option 4: 'Earth's atmosphere absorbs an X-ray.' This statement identifies the fundamental reason: Earth's atmosphere blocks most X-rays from reaching the surface, so X-ray astronomy must be conducted from above the atmosphere. By operating in space, telescopes can detect X-rays that do not penetrate the atmosphere, enabling observations that are impossible from the ground.

Additional considerations: Evaluating all options shows that the central, scientifically accurate justification is tied to atmospheric absorption of X-rays, which motivates placing X-ray observatories in space rather than on Earth. The other choices either mischaracterize X-ray properties, misstate observational capabilities, or attribute irrelevant factors to the mission design.

Why do we need to send an X-ray telescope into space?单项选择题

类似问题

The Chandra Observatory orbiting the Earth is designed to

How did Egyptian culture and governance change during the Ptolemaic period compared to the pharaonic period?

Name the Supreme Court decision that removed financial constraints on PACs.

Political scientists Joshua Kalla and David Broockman find that senior policy makers made themselves available to _____ between three and four times more often than they did to constituents.

Name the political scientist who argues that parties are designed to serve the needs of ambitious politicians (namely candidates and officeholders).

Name the political scientist who said this famous quote about the problems of pluralism: “The flaw in the pluralist heaven is that the heavenly choir sings with a strong upper-class accent.”

What is the name of the third party candidate in 2000 who was not allowed to participate in the presidential debates? Hint: We watched a video clip with him in class.

E.E. Schattshneider said, "Democracy is ________ save in terms of the parties."

更多留学生实用工具

智能学习助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单