black body radiation

简明释义

黑体辐射

英英释义

例句

1.The spectrum of black body radiation 黑体辐射 is continuous and depends solely on temperature.

黑体辐射的光谱是连续的，仅依赖于温度。

2.The study of black body radiation 黑体辐射 is fundamental to understanding thermal physics.

对黑体辐射的研究是理解热物理学的基础。

3.The formula for black body radiation 黑体辐射 was derived by Max Planck in 1900.

黑体辐射的公式是由马克斯·普朗克在1900年推导出来的。

4.In astrophysics, black body radiation 黑体辐射 helps us understand the temperature of celestial bodies.

在天体物理学中，黑体辐射帮助我们理解天体的温度。

5.Scientists use the concept of black body radiation 黑体辐射 to explain how stars emit light.

科学家使用黑体辐射的概念来解释恒星如何发光。

作文

The concept of black body radiation is fundamental in the field of physics, particularly in understanding how objects emit and absorb thermal radiation. A perfect black body is an idealized physical object that absorbs all incident electromagnetic radiation, regardless of frequency or angle of incidence. This means that it does not reflect or transmit any light; instead, it only emits radiation based on its temperature. The study of black body radiation led to significant advancements in quantum mechanics and thermodynamics, revealing the relationship between temperature and the spectrum of emitted radiation.In the early 20th century, physicists were puzzled by the behavior of radiation emitted from heated objects. Classical physics predicted that at high frequencies, the energy radiated would approach infinity, a phenomenon known as the ultraviolet catastrophe. However, this was not observed in reality. The breakthrough came when Max Planck proposed a new theory in 1900, introducing the concept of quantized energy levels. He suggested that energy could only be emitted or absorbed in discrete units, or quanta, which resolved the discrepancies observed in black body radiation experiments.Planck's law describes the spectral density of electromagnetic radiation emitted by a black body in thermal equilibrium at a given temperature. According to this law, the intensity of radiation increases with temperature, and different wavelengths are emitted at varying intensities. For instance, as an object's temperature rises, it will emit more visible light, transitioning from red to blue as it becomes hotter. This phenomenon is why a heated metal changes color, and it illustrates the principles behind black body radiation.The significance of black body radiation extends beyond theoretical physics; it has practical applications in various fields. For example, it plays a crucial role in astrophysics, where scientists analyze the thermal radiation from stars and other celestial bodies to determine their temperatures and compositions. Additionally, technologies such as infrared cameras and thermal imaging rely on the principles of black body radiation to detect heat emitted by objects, allowing for applications in surveillance, environmental monitoring, and medical diagnostics.Moreover, the study of black body radiation paved the way for the development of quantum theory, influencing numerous scientific advancements. It helped establish the concept of wave-particle duality, which is essential for understanding phenomena at the atomic and subatomic levels. The implications of Planck's work extend to modern physics, influencing theories related to photons, lasers, and even the development of quantum computers.In conclusion, black body radiation serves as a cornerstone of modern physics, illustrating the intricate relationship between temperature, energy, and electromagnetic radiation. From its historical roots in addressing the ultraviolet catastrophe to its contemporary applications in technology and astrophysics, the study of black body radiation continues to be a vital area of research. Understanding this concept not only enriches our knowledge of the physical world but also drives innovations that shape our technological landscape today.

“黑体辐射”的概念在物理学领域中是基础性的，特别是在理解物体如何发射和吸收热辐射方面。一个完美的黑体是一个理想化的物理对象，它能吸收所有入射的电磁辐射，无论频率或入射角度。这意味着它不会反射或透过任何光；相反，它仅根据其温度发射辐射。“黑体辐射”的研究推动了量子力学和热力学的重大进展，揭示了温度与发射辐射光谱之间的关系。在20世纪初，物理学家们对加热物体发射的辐射行为感到困惑。经典物理学预测在高频率下，辐射的能量将趋向于无穷大，这种现象被称为紫外灾难。然而，现实中并没有观察到这一点。突破发生在1900年，当马克斯·普朗克提出一种新理论，介绍了量子化能级的概念。他建议能量只能以离散单位或量子的形式发射或吸收，这解决了在“黑体辐射”实验中观察到的不一致之处。普朗克定律描述了在给定温度下，处于热平衡状态的黑体发出的电磁辐射的光谱密度。根据该定律，辐射的强度随着温度的升高而增加，不同波长的辐射强度各不相同。例如，随着物体温度的升高，它将发出更多的可见光，从红色转变为蓝色，表明其变得更热。这一现象解释了加热金属变色的原因，并展示了“黑体辐射”的原理。“黑体辐射”的重要性不仅限于理论物理；它在多个领域有实际应用。例如，在天体物理学中，科学家分析恒星和其他天体的热辐射，以确定它们的温度和成分。此外，红外相机和热成像技术依赖于“黑体辐射”的原理来检测物体发出的热量，从而在监控、环境监测和医学诊断等应用中发挥作用。此外，“黑体辐射”的研究为量子理论的发展铺平了道路，影响了许多科学进步。它帮助确立了波粒二象性的概念，这对于理解原子和亚原子水平的现象至关重要。普朗克工作的影响延伸到现代物理，影响了与光子、激光甚至量子计算机相关的理论。总之，“黑体辐射”作为现代物理的基石，展示了温度、能量和电磁辐射之间错综复杂的关系。从其在解决紫外灾难中的历史根源到在技术和天体物理学中的当代应用，“黑体辐射”的研究仍然是一个重要的研究领域。理解这一概念不仅丰富了我们对物理世界的知识，而且推动了塑造我们今天技术格局的创新。