angular magnification

简明释义

角放大率

英英释义

例句

1.The angular magnification of this lens is ideal for birdwatching, allowing enthusiasts to see fine feather details.

这款镜头的角放大率非常适合鸟类观察，允许爱好者看到细致的羽毛细节。

2.Astronomers often discuss the angular magnification of their equipment to determine how well they can observe celestial bodies.

天文学家常常讨论他们设备的角放大率，以确定他们能多好地观察天体。

3.When using a microscope, the angular magnification is crucial for observing small details in specimens.

在使用显微镜时，角放大率对于观察样本中的细小细节至关重要。

4.The telescope has an angular magnification of 50x, which means it makes distant objects appear 50 times larger than they are to the naked eye.

这台望远镜的角放大率为50倍，这意味着它使远处的物体看起来比肉眼看到的要大50倍。

5.To calculate the angular magnification, you can divide the focal length of the objective lens by that of the eyepiece.

要计算角放大率，可以将物镜的焦距除以目镜的焦距。

作文

In the field of optics, the term angular magnification refers to the ratio of the angle subtended by an object at the eye when viewed through an optical instrument to the angle subtended by the same object when viewed with the naked eye. This concept is crucial in understanding how various optical devices, such as telescopes and microscopes, enhance our ability to observe distant or tiny objects. The angular magnification essentially measures how much larger an object appears to the observer compared to its appearance without any optical aid.To illustrate this concept, consider a simple example involving a telescope. When you look at a distant star with your naked eye, it may appear as a small point of light. However, when you use a telescope, the angular magnification allows you to see that star in much greater detail, making it appear larger and more defined. This increase in size is not due to the actual physical size of the star changing; instead, it is a result of the way the telescope gathers and focuses light, thereby increasing the angle at which the star's light enters your eye.The formula for calculating angular magnification can be expressed as the ratio of the focal lengths of the objective lens and the eyepiece lens in a telescope. For instance, if the focal length of the objective lens is 1000 mm and that of the eyepiece is 10 mm, the angular magnification would be 100x. This means that the object being viewed appears 100 times larger than it does to the unaided eye.Understanding angular magnification is not only important in astronomy but also has applications in biology, especially in microscopy. When scientists examine cells or microorganisms under a microscope, they rely on the angular magnification to gain insights into structures that are otherwise invisible to the naked eye. By using different combinations of lenses, a microscope can achieve high levels of angular magnification, allowing researchers to explore the intricate details of biological specimens.Moreover, the concept of angular magnification extends beyond just telescopes and microscopes. It is also applicable in photography, where lenses are designed to capture images with varying degrees of magnification. Photographers often use zoom lenses that provide different angular magnification settings, enabling them to frame their subjects effectively from various distances.In conclusion, the concept of angular magnification plays a vital role in enhancing our visual experience across various fields, including astronomy, biology, and photography. By understanding how angular magnification works, we can appreciate the power of optical instruments in revealing the beauty and complexity of the world around us. Whether we are gazing at stars in the night sky or examining the structure of a cell, angular magnification enables us to see beyond the limitations of our natural vision, unlocking new perspectives and insights that enrich our understanding of the universe.

在光学领域，术语角放大率指的是通过光学仪器观察物体时，眼睛所看到的物体所形成的角度与用裸眼观察同一物体时所形成的角度的比率。这个概念对于理解各种光学设备（如望远镜和显微镜）如何增强我们观察远处或微小物体的能力至关重要。角放大率基本上测量了一个物体相较于没有任何光学辅助时对观察者的外观增大了多少。为了说明这一概念，考虑一个简单的例子，涉及到望远镜。当你用裸眼看一颗遥远的星星时，它可能看起来只是一个小光点。然而，当你使用望远镜时，角放大率使你能够更加清晰地看到那颗星星，使其看起来更大且更清晰。这种尺寸的增加并不是由于星星的实际物理大小发生变化，而是由于望远镜收集和聚焦光线的方式，从而增加了星星的光线进入你眼睛的角度。计算角放大率的公式可以表示为望远镜中物镜和目镜的焦距之比。例如，如果物镜的焦距为1000毫米，而目镜的焦距为10毫米，则角放大率将为100倍。这意味着被观察的物体看起来比裸眼观察时大100倍。理解角放大率不仅在天文学中重要，在生物学中，尤其是在显微镜学中也有应用。当科学家在显微镜下检查细胞或微生物时，他们依赖于角放大率来获取本来肉眼无法看到的结构的见解。通过使用不同组合的镜头，显微镜可以实现高水平的角放大率，使研究人员能够探索生物样本的细致结构。此外，角放大率的概念不仅限于望远镜和显微镜。它在摄影中也适用，镜头设计用于捕捉具有不同放大程度的图像。摄影师通常使用变焦镜头，提供不同的角放大率设置，使他们能够在不同距离有效地构图。总之，角放大率的概念在各个领域中都发挥着重要作用，包括天文学、生物学和摄影。通过理解角放大率的工作原理，我们可以欣赏光学仪器在揭示我们周围世界的美丽和复杂性方面的力量。无论我们是在夜空中凝视星星，还是检查细胞的结构，角放大率使我们能够超越自然视觉的局限，开启新的视角和见解，丰富我们对宇宙的理解。