convex lens

简明释义

凸透镜

英英释义

例句

1.A convex lens is used in eyeglasses to help people see better.

在眼镜中使用凸透镜帮助人们看得更清楚。

2.The camera uses a convex lens to focus light and capture clear images.

相机使用凸透镜来聚焦光线并捕捉清晰的图像。

3.A convex lens can be found in projectors to enlarge images on a screen.

在投影仪中可以找到凸透镜以放大屏幕上的图像。

4.In microscopes, a convex lens magnifies tiny objects for detailed observation.

在显微镜中，凸透镜放大微小物体以便进行详细观察。

5.Using a convex lens, you can start a fire by focusing sunlight onto a piece of paper.

使用凸透镜，你可以通过聚焦阳光在纸上点燃火焰。

作文

A convex lens is a type of lens that is thicker in the center than at the edges. It is designed to converge light rays that are coming from a distance. The unique shape of a convex lens allows it to bend light in such a way that it can focus images. This property makes it an essential component in various optical devices, including cameras, glasses, and microscopes. Understanding how a convex lens works can provide insights into the principles of optics and vision.The primary function of a convex lens is to gather light rays and bring them to a focal point. When parallel rays of light pass through a convex lens, they are refracted towards the center of the lens and converge at a specific point known as the focal point. This focal point is located on the opposite side of the lens from where the light enters. The distance from the center of the lens to the focal point is referred to as the focal length, which is a critical parameter in lens design.In practical applications, convex lenses are used in a variety of instruments. For instance, in photography, a camera lens often includes convex lenses to focus light onto the film or digital sensor, creating a clear image. Similarly, in eyeglasses for correcting hyperopia (farsightedness), convex lenses are prescribed to help focus light properly onto the retina, allowing individuals to see nearby objects clearly.Microscopes also utilize convex lenses to magnify small objects. The combination of multiple convex lenses in a microscope allows for greater magnification and clearer images. This is particularly useful in scientific research and medical applications where observing minute details is crucial.Moreover, the study of convex lenses extends beyond just their practical uses; it also involves understanding the physics behind their operation. When light passes through a convex lens, it undergoes refraction, a phenomenon that occurs because light travels at different speeds in different mediums. The curvature of the lens determines how much the light is bent, and this relationship is described by Snell's law.In conclusion, the convex lens is a fundamental optical element that plays a significant role in various fields, from photography to medicine. Its ability to converge light and focus images is essential for many everyday technologies. By understanding the properties and functions of convex lenses, we gain a deeper appreciation for the science of optics and the tools that enhance our vision and understanding of the world around us. Whether in a simple pair of glasses or a complex microscope, the convex lens remains a vital part of our technological landscape, enabling us to see beyond what is visible to the naked eye.

凸透镜是一种在中心比边缘更厚的透镜。它的设计目的是汇聚来自远处的光线。凸透镜独特的形状使其能够以特定方式弯曲光线，从而聚焦图像。这一特性使其成为各种光学设备的重要组成部分，包括相机、眼镜和显微镜。理解凸透镜的工作原理可以为光学和视觉原理提供洞察。凸透镜的主要功能是收集光线并将其聚焦到一个焦点。当平行光线通过凸透镜时，它们会被折射向透镜的中心，并在一个特定点汇聚，这个点被称为焦点。这个焦点位于光线进入透镜的对面。透镜中心到焦点的距离被称为焦距，这是透镜设计中的一个关键参数。在实际应用中，凸透镜被用于各种仪器。例如，在摄影中，相机镜头通常包括凸透镜，以将光聚焦到胶卷或数字传感器上，从而创建清晰的图像。同样，在纠正远视的眼镜中，开处方的凸透镜有助于将光线正确聚焦到视网膜上，使人们能够清楚地看到近处的物体。显微镜也利用凸透镜来放大小物体。在显微镜中，多个凸透镜的组合可以实现更大的放大倍数和更清晰的图像。这在科学研究和医学应用中尤为重要，因为观察微小细节至关重要。此外，凸透镜的研究不仅仅涉及其实际用途；还涉及理解其操作背后的物理原理。当光线通过凸透镜时，它经历折射，这是一种现象，因为光在不同介质中以不同速度传播。透镜的曲率决定了光线弯曲的程度，而这种关系由斯涅尔定律描述。总之，凸透镜是一种基本的光学元件，在各个领域都发挥着重要作用，从摄影到医学。它聚焦光线和图像的能力对许多日常技术至关重要。通过理解凸透镜的性质和功能，我们对光学科学及增强我们对周围世界的视觉和理解的工具有了更深的欣赏。无论是在简单的眼镜中还是复杂的显微镜中，凸透镜始终是我们技术环境中不可或缺的一部分，使我们能够看到肉眼无法看到的事物。