black body radiation

简明释义

黑体辐射

英英释义

例句

1.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。

2.The formula for black body radiation 黑体辐射 is derived from Planck's law.

黑体辐射的公式是从普朗克定律推导出来的。

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

在物理学中，黑体辐射描述了一个理想化完美黑体所发出的光谱。

4.The concept of black body radiation 黑体辐射 is fundamental in understanding how objects emit thermal radiation.

黑体辐射的概念是理解物体如何发出热辐射的基础。

5.Astronomers use the principles of black body radiation 黑体辐射 to determine the temperature of stars.

天文学家利用黑体辐射的原理来确定恒星的温度。

作文

Understanding the concept of black body radiation is essential for grasping various principles in physics, particularly in thermodynamics and quantum mechanics. A black body is an idealized physical object that absorbs all incoming radiation, regardless of frequency or angle of incidence. This means that it does not reflect or transmit any light, making it appear completely black when at a lower temperature. However, when heated, a black body emits radiation in a characteristic spectrum that depends only on its temperature, which is described by Planck's law. This phenomenon is known as black body radiation, and it has significant implications in understanding how objects emit energy in the form of electromagnetic radiation.The study of black body radiation began in the late 19th century when physicists were trying to understand how objects radiate heat. Classical physics struggled to explain the observed spectra of radiation emitted by heated objects. According to classical theories, as the temperature increased, the intensity of radiation should also increase indefinitely across all wavelengths, leading to what is known as the 'ultraviolet catastrophe.' This contradiction between theory and experiment prompted the need for a new understanding.In 1900, Max Planck introduced his groundbreaking hypothesis that energy is quantized, meaning it can only be emitted or absorbed in discrete amounts called quanta. By applying this idea, he derived a formula that accurately described the intensity of black body radiation at different wavelengths for any given temperature. Planck's law showed that the intensity of radiation increases with temperature but peaks at a certain wavelength, after which it decreases. This was a pivotal moment in the development of quantum theory, as it laid the foundation for future discoveries about the nature of light and energy.The significance of black body radiation extends beyond theoretical physics; it has practical applications in various fields. For instance, it plays a crucial role in astrophysics, where it helps scientists determine the temperatures and compositions of stars and other celestial bodies. By analyzing the spectrum of light emitted by these objects, researchers can infer their surface temperatures and understand their life cycles.Additionally, black body radiation principles are employed in modern technologies such as thermal imaging cameras and infrared sensors. These devices rely on detecting the thermal radiation emitted by objects, allowing us to visualize heat patterns in our environment. For example, firefighters use thermal imaging to locate hotspots in burning buildings, while medical professionals use similar technology to identify areas of abnormal heat in the human body.In conclusion, the concept of black body radiation is fundamental to both theoretical and applied physics. It not only provides insight into the nature of electromagnetic radiation but also has far-reaching implications in various scientific and technological domains. Understanding black body radiation allows us to appreciate the intricate relationships between temperature, energy, and light, ultimately enhancing our knowledge of the universe around us.

理解黑体辐射的概念对于掌握物理学中的各种原理至关重要，特别是在热力学和量子力学中。黑体是一个理想化的物理对象，它可以吸收所有入射辐射，无论频率或入射角。这意味着它不会反射或透过任何光，使其在较低温度下看起来完全是黑色的。然而，当加热时，黑体以特征性的光谱发出辐射，这仅取决于其温度，这一现象由普朗克定律描述。这个现象被称为黑体辐射，它在理解物体如何以电磁辐射的形式发出能量方面具有重要意义。对黑体辐射的研究始于19世纪末，当时物理学家试图理解物体如何辐射热量。经典物理学难以解释加热物体发出的辐射谱。根据经典理论，随着温度的升高，辐射的强度也应该在所有波长上无限增加，导致所谓的“紫外线灾难”。这一理论与实验之间的矛盾促使人们需要新的理解。1900年，马克斯·普朗克提出了他的开创性假设，即能量是量子化的，意味着它只能以离散的量（称为量子）被发射或吸收。通过应用这一思想，他推导出了一个公式，准确描述了任何给定温度下黑体辐射在不同波长下的强度。普朗克定律表明，辐射的强度随着温度的升高而增加，但在某个波长处达到峰值，之后则会下降。这是量子理论发展的一个关键时刻，因为它为未来关于光和能量本质的发现奠定了基础。黑体辐射的重要性不仅限于理论物理；它在各个领域都有实际应用。例如，它在天体物理学中起着关键作用，帮助科学家确定恒星和其他天体的温度和成分。通过分析这些物体发出的光谱，研究人员可以推断其表面温度并了解其生命周期。此外，黑体辐射原理被现代技术广泛应用于热成像相机和红外传感器等设备。这些设备依赖于检测物体发出的热辐射，使我们能够可视化环境中的热模式。例如，消防员使用热成像技术定位燃烧建筑中的热点，而医疗专业人员则使用类似技术识别人体内异常热区。总之，黑体辐射的概念是理论和应用物理学的基础。它不仅提供了对电磁辐射本质的洞察，还在各种科学和技术领域具有深远的影响。理解黑体辐射使我们能够欣赏温度、能量和光之间复杂的关系，最终增强我们对周围宇宙的认识。