black body

简明释义

黑体

英英释义

例句

1.A perfect black body 黑体 absorbs all incident radiation without reflection.

一个完美的黑体 黑体 吸收所有入射辐射而不反射。

2.The temperature of a black body 黑体 can be determined from its emitted radiation.

可以通过其发出的辐射来确定黑体 黑体 的温度。

3.In thermodynamics, the concept of a black body 黑体 is crucial for understanding heat transfer.

在热力学中，黑体 黑体 的概念对于理解热传递至关重要。

4.The spectrum emitted by a black body 黑体 is described by Planck's law.

由黑体 黑体 发出的光谱由普朗克定律描述。

5.Astronomers often use the concept of a black body 黑体 to model the radiation from stars.

天文学家常常使用黑体 黑体 的概念来模拟恒星的辐射。

作文

In the realm of physics, the term black body refers to an idealized physical object that absorbs all incident electromagnetic radiation, regardless of frequency or angle of incidence. The concept of a black body is crucial in understanding thermal radiation, as it serves as a perfect emitter and absorber of heat. When a black body is heated, it emits radiation in a characteristic spectrum that depends solely on its temperature, which is described by Planck's law. This principle allows scientists to derive important information about the properties of stars and other celestial bodies by analyzing their emitted radiation.The concept of a black body was first introduced by the German physicist Gustav Kirchhoff in the mid-19th century. He postulated that a perfect black body would be an ideal radiator and absorber of energy, leading to the development of the theory of black body radiation. This theory laid the groundwork for quantum mechanics, as Max Planck's work on black body radiation ultimately led to the formulation of his famous equation for quantized energy levels.Understanding the properties of a black body helps explain various phenomena in the universe. For example, the Sun can be approximated as a black body radiator, emitting a broad spectrum of electromagnetic radiation, including visible light, ultraviolet, and infrared radiation. By studying the Sun's radiation, astronomers can infer its surface temperature and composition. Similarly, distant stars can also be analyzed using the principles of black body radiation, allowing scientists to gain insights into their ages, distances, and chemical compositions.Moreover, the concept of a black body has practical applications in everyday technology. For instance, thermal cameras rely on the principles of black body radiation to detect heat signatures. These devices can visualize temperature differences by capturing the infrared radiation emitted by objects, effectively turning a black body concept into a useful tool for various fields, including medicine, firefighting, and building inspections.In conclusion, the idea of a black body is fundamental in both theoretical and applied physics. It provides a framework for understanding how objects emit and absorb radiation, influencing our knowledge of the universe and the development of technologies that utilize thermal imaging. As research continues to evolve, the principles surrounding the black body will remain integral in advancing our understanding of physical phenomena and improving technological innovations.

在物理学领域，术语黑体指的是一种理想化的物理物体，它能够吸收所有入射的电磁辐射，无论频率或入射角度如何。黑体的概念对于理解热辐射至关重要，因为它作为热量的完美发射体和吸收体。当黑体被加热时，它以特定的光谱发射辐射，这仅取决于其温度，这一原理由普朗克定律所描述。这一原理使科学家能够通过分析星体及其他天体发射的辐射，推导出关于它们特性的相关信息。黑体的概念最早由德国物理学家古斯塔夫·基尔霍夫在19世纪中叶提出。他假设一个完美的黑体将是能量的理想辐射体和吸收体，从而推动了黑体辐射理论的发展。这一理论为量子力学奠定了基础，因为马克斯·普朗克关于黑体辐射的研究最终导致了他著名的量子能级方程的形成。理解黑体的特性有助于解释宇宙中的各种现象。例如，太阳可以被近似为一个黑体辐射体，发出包括可见光、紫外线和红外辐射在内的广谱电磁辐射。通过研究太阳的辐射，天文学家可以推测其表面温度和成分。类似地，遥远的恒星也可以利用黑体辐射的原理进行分析，使科学家能够获得关于它们的年龄、距离和化学成分的见解。此外，黑体的概念在日常技术中也有实际应用。例如，热成像仪依赖于黑体辐射的原理来检测热签名。这些设备可以通过捕捉物体发出的红外辐射来可视化温度差异，实际上将黑体的概念转化为多种领域（包括医学、消防和建筑检查）中的有用工具。总之，黑体的概念在理论和应用物理学中都是基础性的。它为理解物体如何发射和吸收辐射提供了框架，影响了我们对宇宙的认识以及利用热成像技术开发的技术。随着研究的不断发展，围绕黑体的原则将继续在推动我们对物理现象的理解和改善技术创新中发挥重要作用。