arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv physics/0306050physics.space-phphysics.optics
收藏

太阳帆和镜子

The solar sail and the mirror

Thomas Gold

摘要:

研究了非相干光在不同表面上的辐射压。热力学规则,首先由卡诺在1824年,描述了限制的数额自由能,可以获得的来源,热能,他给了令人信服的理由,这一规则,如果更多的自由能比他规定可以提取,然后热泵可以使用的自由能和重新创造所有的热能已经消耗。这样就可以制造出永动机。现在,179年后,有人提出要驾驶一艘航天器,预计将获得速度从辐射压力的阳光预计将施加在太阳帆,面板的薄塑料板,镜子表面上的一面面对太阳。然而,详细审查这一建议表明,它是在直接冲突与卡诺的规则,并没有这样的压力,可以预期。要么卡诺公认的规则是错误的,要么太阳帆的建议根本行不通。

英文摘要:

The radiation pressure exerted by incoherent light on diverse surfaces is examined. The thermodynamic rule, first given by Carnot in 1824, describes the limitation to the amount of free energy that can be obtained from a source of thermal energy, and he gave the compelling reason for this rule, that if more free energy than he had prescribed could ever be extracted, then a heat pump could use that free energy and re-create all the heat energy that had been consumed. A perpetual motion machine could then be constructed. Now, 179 years later, it is proposed to fly a spacecraft that is expected to gain velocity from the radiation pressure the sunlight is expected to exert on solar sails, panels of thin plastic sheets, mirror surfaced on the side facing the sun. However a detailed examination of this proposal shows it to be in direct conflict with Carnot's rule, and no such pressure can be expected. Either Carnot's accepted rule is in error, or the solar sail proposal will not work at all.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑