black body radiation

简明释义

黑体辐射

英英释义

例句

1.In physics, black body radiation 黑体辐射 describes the theoretical spectrum of light emitted by an idealized perfect emitter.

在物理学中，黑体辐射描述了理想化完美发射体所发出的光谱。

2.The concept of black body radiation 黑体辐射 is crucial for understanding how stars emit energy.

黑体辐射的概念对于理解恒星如何发出能量至关重要。

3.Planck's law describes how black body radiation 黑体辐射 varies with temperature and wavelength.

普朗克定律描述了黑体辐射如何随温度和波长变化。

4.Scientists use black body radiation 黑体辐射 to explain the thermal radiation emitted by objects at different temperatures.

科学家使用黑体辐射来解释不同温度物体发出的热辐射。

5.The study of black body radiation 黑体辐射 led to the development of quantum mechanics.

对黑体辐射的研究促成了量子力学的发展。

作文

The concept of black body radiation plays a pivotal role in the field of physics, particularly in understanding thermal radiation and quantum mechanics. A perfect black body is an idealized physical object that absorbs all incoming radiation, regardless of frequency or angle of incidence. This means that a black body does not reflect any light, making it appear completely black when cold. However, when heated, it emits radiation in a characteristic spectrum that depends solely on its temperature. The study of black body radiation has led to significant advancements in our understanding of energy distribution across different wavelengths and has profound implications in various scientific disciplines.One of the most important contributions to the understanding of black body radiation was made by Max Planck in the early 20th century. Planck proposed that electromagnetic radiation could only be emitted or absorbed in discrete packets of energy, which he called quanta. This groundbreaking idea laid the foundation for quantum theory and provided a solution to the ultraviolet catastrophe, a problem that arose when classical physics failed to explain the observed spectrum of radiation emitted by heated objects. Planck's law of black body radiation describes how the intensity of radiation emitted by a black body varies with wavelength at a given temperature, revealing that shorter wavelengths correspond to higher intensities.The significance of black body radiation extends beyond theoretical physics; it has practical applications in various technologies. For instance, the principles of black body radiation are crucial in the design of infrared thermometers, which measure temperature based on the infrared radiation emitted by objects. Additionally, understanding black body radiation is essential in astrophysics, where astronomers analyze the light from stars and other celestial bodies to determine their temperatures, compositions, and distances from Earth.Moreover, the study of black body radiation has implications for climate science as well. The Earth itself can be approximated as a black body that absorbs solar radiation and re-emits energy back into space. Understanding the balance between absorbed and emitted radiation is vital for comprehending global warming and climate change. Enhanced greenhouse effects occur when certain gases trap heat in the atmosphere, affecting the natural equilibrium of black body radiation and leading to rising global temperatures.In conclusion, the concept of black body radiation is fundamental to both theoretical and applied physics. It provides insights into the nature of electromagnetic radiation and has paved the way for significant advancements in technology and our understanding of the universe. From Planck's revolutionary ideas to modern applications in various fields, the study of black body radiation continues to be an essential aspect of scientific exploration and innovation.

“黑体辐射”的概念在物理学领域中扮演着至关重要的角色，特别是在理解热辐射和量子力学方面。一个完美的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。这意味着黑体不会反射任何光线，使其在冷却时看起来完全是黑色的。然而，当加热时，它以一个特征性的光谱发射辐射，这个光谱仅依赖于其温度。“黑体辐射”的研究已经推动了我们对不同波长能量分布的理解，并在多个科学学科中具有深远的影响。在20世纪初，马克斯·普朗克对“黑体辐射”的理解做出了重要贡献。普朗克提出电磁辐射只能以离散的能量包（他称之为量子）发射或吸收。这一突破性的想法为量子理论奠定了基础，并提供了解决紫外灾难的方法，这是一个当经典物理无法解释加热物体发射的辐射光谱时出现的问题。普朗克的黑体辐射定律描述了在给定温度下，黑体发射的辐射强度如何随波长变化，揭示出短波长对应于更高的强度。“黑体辐射”的重要性不仅限于理论物理；它在各种技术中的实际应用也至关重要。例如，黑体辐射的原理对于红外温度计的设计至关重要，红外温度计根据物体发射的红外辐射来测量温度。此外，理解“黑体辐射”在天体物理学中也很重要，天文学家分析来自恒星和其他天体的光，以确定它们的温度、组成和与地球的距离。此外，“黑体辐射”的研究对气候科学也有影响。地球本身可以被近似为一个黑体，它吸收太阳辐射并将能量重新发射回太空。理解吸收和发射辐射之间的平衡对于理解全球变暖和气候变化至关重要。当某些气体在大气中捕获热量时，会发生增强的温室效应，影响“黑体辐射”的自然平衡，导致全球气温上升。总之，“黑体辐射”的概念是理论和应用物理的基础。它为电磁辐射的性质提供了见解，并为技术和我们对宇宙的理解的重大进展铺平了道路。从普朗克的革命性思想到现代在各个领域的应用，“黑体辐射”的研究仍然是科学探索和创新的重要方面。