absolute black body

简明释义

绝对黑体

英英释义

例句

1.In thermodynamics, the concept of an absolute black body is crucial for understanding heat transfer.

在热力学中，绝对黑体的概念对于理解热传递至关重要。

2.An absolute black body is an idealized physical object that perfectly absorbs all incoming radiation.

一个绝对黑体是一个理想化的物理对象，完美吸收所有入射辐射。

3.An absolute black body emits radiation based solely on its temperature, according to Planck's law.

根据普朗克定律，绝对黑体仅根据其温度发出辐射。

4.The concept of an absolute black body helps scientists understand the emission spectrum of real materials.

一个绝对黑体的概念帮助科学家理解真实材料的发射光谱。

5.The sun can be approximated as an absolute black body for many calculations in astrophysics.

在天体物理学中的许多计算中，太阳可以近似为一个绝对黑体。

作文

In the realm of physics, the concept of an absolute black body is crucial for understanding thermal radiation and the laws that govern it. An absolute black body is defined as an idealized physical object that perfectly absorbs all incoming radiation, regardless of the frequency or angle of incidence. This means that it does not reflect or transmit any light; instead, it converts all incident electromagnetic radiation into internal energy, leading to a state of thermal equilibrium. The significance of this concept lies in its application to various fields, including thermodynamics, quantum mechanics, and astronomy.The study of an absolute black body is foundational to Planck's law of black-body radiation, which describes how objects emit radiation based on their temperature. According to this law, a perfect black body at a specific temperature emits radiation across a continuous spectrum of wavelengths, with the intensity peaking at a particular wavelength determined by that temperature. This phenomenon is crucial in explaining why stars, including our sun, emit light and heat. As the temperature of an object increases, it emits more radiation, which is why hotter objects appear brighter and can even glow visibly, as seen with incandescent bulbs or heated metals.Furthermore, the concept of an absolute black body also provides insights into the second law of thermodynamics, which states that energy spontaneously tends to disperse or spread out if it is not hindered from doing so. In a universe filled with radiation, the absolute black body serves as a benchmark for measuring the efficiency of other materials in absorbing and emitting energy. Real-world materials can only approximate this ideal, and their efficiency can be quantified using a parameter known as emissivity.In practical applications, the idea of an absolute black body influences the design of thermal cameras, which detect infrared radiation emitted by objects. Understanding how close a material comes to being an absolute black body helps engineers and scientists create more effective sensors and improve energy efficiency in buildings and devices. For instance, in solar energy applications, materials that closely mimic absolute black body behavior are sought after to maximize energy absorption from sunlight.Moreover, the concept extends beyond scientific theories and applications; it has philosophical implications as well. The absolute black body serves as a metaphor for perfection and the unattainable ideal. In a world where nothing is truly perfect, the absolute black body represents the limits of our understanding and the pursuit of knowledge. It challenges us to explore the boundaries of what we know about energy, matter, and the universe itself.In conclusion, the absolute black body is a fundamental concept in physics that enables scientists to understand and predict the behavior of thermal radiation. Its implications stretch across various disciplines, influencing technology and providing a framework for theoretical exploration. As we continue to investigate the mysteries of the universe, the absolute black body remains a symbol of the quest for knowledge and the understanding of the natural laws that govern our existence.

在物理学领域，绝对黑体的概念对于理解热辐射及其规律至关重要。绝对黑体被定义为一种理想化的物理物体，它完美地吸收所有入射辐射，无论频率或入射角度。这意味着它不会反射或透射任何光；相反，它将所有入射的电磁辐射转化为内部能量，从而达到热平衡状态。这个概念的重要性在于它在热力学、量子力学和天文学等多个领域的应用。绝对黑体的研究是普朗克黑体辐射定律的基础，该定律描述了物体如何根据其温度发出辐射。根据该定律，在特定温度下，完美的黑体会在连续的波长谱中发出辐射，其强度在由该温度决定的特定波长处达到峰值。这一现象对于解释星星（包括我们的太阳）为何发出光和热至关重要。当物体的温度升高时，它发出的辐射也会增加，这就是为什么较热的物体看起来更亮，甚至可以发出可见光，如白炽灯泡或加热金属所示。此外，绝对黑体的概念还提供了对热力学第二定律的深入理解，该定律指出，能量在不受阻碍的情况下自发地趋向于扩散或分散。在充满辐射的宇宙中，绝对黑体作为测量其他材料吸收和发射能量效率的基准。现实世界中的材料只能近似这一理想，其效率可以通过一个称为发射率的参数进行量化。在实际应用中，绝对黑体的理念影响着热成像相机的设计，这些相机检测物体发出的红外辐射。了解某种材料与绝对黑体行为的接近程度，有助于工程师和科学家创造更有效的传感器，并提高建筑和设备的能效。例如，在太阳能应用中，寻求能够尽可能模拟绝对黑体行为的材料，以最大化从阳光中吸收的能量。此外，这一概念不仅限于科学理论和应用，还具有哲学意义。绝对黑体作为完美和不可实现理想的隐喻。在一个没有真正完美的世界里，绝对黑体代表了我们理解的极限以及对知识的追求。它挑战我们探索关于能量、物质和宇宙本身的知识边界。总之，绝对黑体是物理学中的一个基本概念，使科学家能够理解和预测热辐射的行为。它的影响跨越多个学科，影响技术并为理论探索提供框架。随着我们继续探讨宇宙的奥秘，绝对黑体仍然是对知识追求和理解支配我们存在的自然法则的象征。