black body

简明释义

黑体

英英释义

例句

1.The sun can be approximated as a black body 黑体 radiator for many calculations.

在许多计算中，太阳可以近似为一个黑体 black body 辐射器。

2.The concept of a black body 黑体 is crucial in understanding thermal radiation.

理解热辐射时，黑体 black body 的概念至关重要。

3.A perfect black body 黑体 emits radiation at all wavelengths.

完美的黑体 black body 在所有波长上发出辐射。

4.In physics, a black body 黑体 is an idealized object that absorbs all incoming radiation.

在物理学中，黑体 black body 是一个理想化的物体，能够吸收所有入射辐射。

5.The temperature of a black body 黑体 determines the peak wavelength of its emitted radiation.

一个黑体 black body 的温度决定了其发射辐射的峰值波长。

作文

In the realm of physics, the concept of a black body plays a pivotal role in understanding thermal radiation. A black body is an idealized physical object that absorbs all incoming radiation, regardless of frequency or angle of incidence. This means that a perfect black body does not reflect or transmit any light; instead, it converts all incident energy into heat. The significance of this concept lies in its application to various fields such as astrophysics, thermodynamics, and quantum mechanics. One of the most fascinating aspects of a black body is its ability to emit radiation when heated. According to Planck's law, a black body emits electromagnetic radiation in a characteristic spectrum that depends solely on its temperature. This means that as the temperature of a black body increases, it emits more radiation at shorter wavelengths, leading to the phenomenon known as black-body radiation. This principle has profound implications for our understanding of the universe. For instance, stars can be approximated as black bodies, allowing astronomers to determine their surface temperatures based on the color and intensity of the light they emit.Moreover, the concept of a black body is crucial in the development of the laws of thermodynamics. The first law states that energy cannot be created or destroyed, only transformed from one form to another. A black body serves as a perfect model for understanding how energy is absorbed and emitted. In practical applications, materials that closely resemble a black body are used in designing thermal detectors and sensors, which require accurate measurements of thermal radiation.The study of black body radiation also led to the development of quantum theory. Max Planck, in his groundbreaking work, proposed that energy is quantized, introducing the idea of energy quanta or photons. This was a revolutionary idea that laid the foundation for modern physics. Understanding the behavior of a black body helped scientists grasp the dual nature of light, which exhibits both wave-like and particle-like properties. In everyday life, we encounter examples of black bodies in various forms. For instance, a perfect black matte surface can be considered a good approximation of a black body. This is why such surfaces are often used in thermal imaging cameras, as they absorb and emit infrared radiation effectively. Similarly, the sun can be approximated as a black body radiator, with its effective temperature influencing the climate and weather patterns on Earth.In conclusion, the concept of a black body is fundamental in the study of physics, providing insights into thermal radiation, energy transformation, and the nature of light. It serves as a benchmark for understanding real-world materials and phenomena. As we delve deeper into the mysteries of the universe, the principles associated with a black body will undoubtedly continue to illuminate our path toward knowledge and discovery.

在物理学领域，黑体的概念在理解热辐射方面发挥着关键作用。黑体是一个理想化的物理对象，它吸收所有入射辐射，无论频率或入射角度。这意味着完美的黑体不会反射或透射任何光，而是将所有入射能量转化为热能。这个概念的重要性在于其在天体物理学、热力学和量子力学等多个领域的应用。黑体最引人注目的方面之一是它在加热时发出辐射的能力。根据普朗克定律，黑体以一种特征性光谱发射电磁辐射，这种光谱仅依赖于其温度。这意味着随着黑体温度的升高，它在较短波长下发出更多辐射，导致了黑体辐射现象。这一原理对我们理解宇宙具有深远的影响。例如，恒星可以被近似为黑体，这使得天文学家能够根据它们发出的光的颜色和强度来确定其表面温度。此外，黑体的概念在热力学定律的发展中至关重要。第一定律指出，能量不能被创造或销毁，只能从一种形式转化为另一种形式。黑体作为一个完美的模型，有助于理解能量是如何被吸收和发射的。在实际应用中，接近黑体的材料被用于设计热探测器和传感器，这些设备需要准确测量热辐射。对黑体辐射的研究还导致了量子理论的发展。马克斯·普朗克在他的开创性工作中提出，能量是量子化的，介绍了能量量子或光子的概念。这是一个革命性的想法，为现代物理学奠定了基础。理解黑体的行为帮助科学家掌握了光的双重性质，光既表现出波动性又表现出粒子性。在日常生活中，我们在各种形式中遇到黑体的例子。例如，一个完美的黑色哑光表面可以被认为是一个良好的黑体近似。这就是为什么此类表面通常用于热成像摄像机，因为它们有效地吸收和发射红外辐射。同样，太阳可以被近似为一个黑体辐射器，其有效温度影响着地球的气候和天气模式。总之，黑体的概念在物理学研究中是基础性的，为热辐射、能量转化和光的性质提供了洞察。它作为理解现实材料和现象的基准。随着我们深入探索宇宙的奥秘，与黑体相关的原理无疑将继续照亮我们通往知识和发现的道路。