convex lens

简明释义

凸透镜

英英释义

例句

1.When you look through a magnifying glass, you are using a convex lens.

当你通过放大镜看东西时，你正在使用一个凸透镜。

2.The camera uses a convex lens to capture sharp images of distant subjects.

相机使用凸透镜来捕捉远处物体的清晰图像。

3.A convex lens can magnify small objects, making them easier to see.

一个凸透镜可以放大小物体，使其更容易看清。

4.A convex lens converges light rays to a focal point, which is useful in various optical devices.

一个凸透镜将光线聚集到一个焦点，这在各种光学设备中非常有用。

5.In a projector, a convex lens is used to focus light and create a larger image.

在投影仪中，使用凸透镜来聚焦光线并创建更大的图像。

作文

A convex lens is a type of optical lens that is thicker in the middle than at the edges. This unique shape allows it to converge light rays that are coming from a distance. The primary function of a convex lens is to focus light, which makes it an essential component in many optical devices such as cameras, glasses, and microscopes. When light passes through a convex lens, it bends inward, and this bending of light creates a real image on the opposite side of the lens. This property is utilized in various applications, including magnifying objects and correcting vision problems.In everyday life, we encounter convex lenses more often than we might realize. For example, reading glasses often contain convex lenses to help individuals with hyperopia, or farsightedness. These lenses allow people to see nearby objects more clearly by converging the light before it reaches the eye. Similarly, cameras use convex lenses to capture sharp images. By adjusting the distance between the lens and the image sensor, photographers can achieve different focal lengths, which affects how zoomed-in or zoomed-out the final photograph appears.The scientific principles behind convex lenses are rooted in the study of optics. When light travels through a medium, it changes speed depending on the density of that medium. In the case of a convex lens, the lens material is denser than air, causing the light to slow down and bend towards the normal line, which is an imaginary line perpendicular to the surface of the lens. This bending of light is described by Snell's law, which explains how light refracts when entering a new medium.Another fascinating aspect of convex lenses is their ability to create virtual images. When an object is placed closer to the lens than its focal point, the convex lens produces a virtual image that appears larger and upright. This characteristic is particularly useful in devices like magnifying glasses, where users want to see fine details more clearly. The larger image produced by the convex lens allows for better inspection of small objects, making it a valuable tool for hobbies like stamp collecting or jewelry appraisal.In addition to these practical uses, convex lenses also play a crucial role in scientific research. Telescopes, for instance, utilize large convex lenses to gather light from distant stars and galaxies. By focusing this light, astronomers can observe celestial bodies that are light-years away. The ability to enlarge distant images is vital for understanding the universe and our place within it.In conclusion, convex lenses are not just simple pieces of glass; they are powerful tools that enhance our vision and expand our understanding of the world around us. From helping individuals read more comfortably to allowing scientists to explore the far reaches of space, the applications of convex lenses are vast and varied. Their fundamental properties make them indispensable in both everyday life and advanced scientific endeavors, showcasing the remarkable interplay between physics and technology. As we continue to innovate and develop new optical devices, the importance of convex lenses will undoubtedly remain significant in shaping our visual experiences and expanding our knowledge of the universe.

凸透镜是一种光学透镜，其中心比边缘厚。这种独特的形状使其能够聚焦来自远处的光线。凸透镜的主要功能是聚焦光线，这使得它成为许多光学设备（如相机、眼镜和显微镜）的重要组成部分。当光线通过凸透镜时，它会向内弯曲，这种光的弯曲在透镜的另一侧形成一个真实的图像。这一特性被用于各种应用，包括放大物体和矫正视力问题。在日常生活中，我们遇到凸透镜的机会比我们想象的要多。例如，阅读眼镜通常包含凸透镜，以帮助远视的人。这些透镜使人们能够更清晰地看到近处的物体，通过在光线到达眼睛之前聚焦光线。类似地，相机使用凸透镜来捕捉清晰的图像。通过调整透镜与图像传感器之间的距离，摄影师可以实现不同的焦距，这会影响最终照片的缩放程度。凸透镜背后的科学原理根植于光学研究。当光线穿过一种介质时，它会根据该介质的密度改变速度。在凸透镜的情况下，透镜材料的密度比空气更大，导致光线减速并向法线弯曲，法线是与透镜表面垂直的虚线。这种光的弯曲由斯涅尔定律描述，解释了光线在进入新介质时的折射。凸透镜的另一个迷人方面是它们创造虚像的能力。当物体靠近透镜而低于其焦点时，凸透镜会产生一个看起来更大且直立的虚像。这一特性在放大镜等设备中尤为有用，用户希望更清楚地看到细节。凸透镜产生的较大图像允许更好地检查小物体，使其成为集邮或珠宝评估等爱好的宝贵工具。除了这些实际用途，凸透镜在科学研究中也发挥着至关重要的作用。例如，望远镜利用大型凸透镜来收集来自遥远恒星和星系的光线。通过聚焦这些光线，天文学家可以观察到光年之外的天体。放大遥远图像的能力对于理解宇宙及我们在其中的位置至关重要。总之，凸透镜不仅仅是简单的玻璃；它们是增强我们视觉和扩展我们对周围世界理解的强大工具。从帮助个人更舒适地阅读到让科学家探索宇宙的遥远角落，凸透镜的应用广泛而多样。它们的基本特性使它们在日常生活和先进科学事业中不可或缺，展示了物理学与技术之间的非凡互动。随着我们继续创新和开发新的光学设备，凸透镜的重要性无疑将在塑造我们的视觉体验和扩展我们对宇宙的知识中保持重要地位。