V2EX real image

Real Image

定义 Definition

real image(真实像 / 实像):在光学中指由光线实际会聚形成、可以投射到屏幕上的像(常见于凹面镜或凸透镜成像)。也常与 virtual image(虚像)相对。

例句 Examples

A concave mirror can form a real image.
凹面镜可以形成实像。

By adjusting the lens position, we projected a real image onto the screen for everyone to see clearly.
通过调整透镜的位置,我们把实像投射到屏幕上,让大家都能看清楚。

发音 Pronunciation

/ril md/

词源 Etymology

该短语由 realimage 组成:real 源自拉丁语 realis(“真实的、实际的”),image 源自拉丁语 imago(“形象、影像”)。在光学语境里,“real”强调这种像是由光线真实会聚而成,而不是视觉延长线“看起来像在那里”的虚像。

相关词 Related Words

文学与作品 Literary Works

  • Opticks Isaac Newton(《光学》,讨论成像与光的实验思想,常见相关术语语境)
  • The Feynman Lectures on Physics Richard P. Feynman(《费曼物理学讲义》,光学部分涉及实像/虚像等概念)
  • Optics Eugene Hecht(《光学》,经典教材中系统使用“real image”这一术语)
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