heat radiation

简明释义

热辐射

英英释义

例句

1.In winter, the fireplace produces heat radiation 热辐射 that keeps the room comfortable.

在冬天，壁炉产生的热辐射 热辐射使房间保持舒适。

2.The principle of heat radiation 热辐射 is used in thermal imaging technology.

热辐射 热辐射的原理被用于热成像技术。

3.Infrared cameras can detect heat radiation 热辐射 from objects in complete darkness.

红外线相机可以在完全黑暗中探测到物体的热辐射 热辐射。

4.Plants can lose water through heat radiation 热辐射 during hot days.

植物在炎热的日子里可以通过热辐射 热辐射失去水分。

5.The sun emits a significant amount of heat radiation 热辐射 that warms the Earth.

太阳发出大量的热辐射 热辐射，使地球变暖。

作文

Heat is a form of energy that can be transferred from one body to another. One of the most important methods of heat transfer is through heat radiation, which is the process by which energy is emitted as electromagnetic waves. This phenomenon occurs when matter is heated, causing it to emit energy in the form of infrared radiation. Understanding heat radiation is crucial in various fields, including physics, engineering, and environmental science.To begin with, heat radiation differs from other forms of heat transfer, such as conduction and convection. In conduction, heat is transferred through direct contact between materials, while convection involves the movement of fluids (liquids or gases) that carry heat away from a source. However, heat radiation does not require any medium to travel; it can occur even in a vacuum. This unique characteristic makes it possible for the sun's energy to reach the Earth, despite the vast emptiness of space.One of the key principles governing heat radiation is Stefan-Boltzmann Law, which states that the total energy radiated per unit surface area of a black body is proportional to the fourth power of its absolute temperature. This means that as the temperature of an object increases, the amount of heat radiation it emits grows significantly. For instance, a hot stove emits much more heat radiation than a cold one, making it easier for us to feel the warmth from a distance.Another important aspect of heat radiation is its relationship with color and material properties. Darker objects tend to absorb more heat radiation and emit it more effectively than lighter-colored objects. This is why, on a sunny day, wearing dark clothing can make you feel warmer than wearing light-colored clothing. Additionally, materials with high emissivity, such as black paint, are better at radiating heat compared to shiny surfaces like aluminum foil, which reflect most of the incoming heat radiation.In practical applications, understanding heat radiation is essential in designing energy-efficient buildings. Architects and engineers often use materials that optimize heat radiation properties to maintain comfortable indoor temperatures. For example, double-glazed windows can minimize unwanted heat radiation loss during winter while allowing sunlight to warm up spaces naturally during the day.Moreover, heat radiation plays a significant role in climate science. The Earth's atmosphere absorbs and emits heat radiation, which helps regulate the planet's temperature. However, human activities, such as burning fossil fuels, have increased the concentration of greenhouse gases, leading to enhanced heat radiation trapping. This phenomenon contributes to global warming and climate change, making it vital for scientists to study and understand how heat radiation interacts with the environment.In conclusion, heat radiation is a fundamental concept that impacts many aspects of our daily lives. From the way we experience temperature changes to the design of energy-efficient buildings and the study of climate change, understanding heat radiation is essential. By grasping the principles of heat radiation, we can make informed decisions about energy use, environmental conservation, and even personal comfort. As we continue to explore the wonders of physics and energy transfer, heat radiation remains a critical topic that deserves our attention and respect.

热是一种能量形式，可以从一个物体转移到另一个物体。热传递的最重要方法之一是通过热辐射，这是能量以电磁波的形式发射的过程。当物质被加热时，它会以红外辐射的形式发出能量。理解热辐射在物理学、工程学和环境科学等多个领域中都是至关重要的。首先，热辐射与其他热传递方式（如导热和对流）不同。在导热中，热量通过材料之间的直接接触传递，而对流则涉及携带热量的流体（液体或气体）的运动。然而，热辐射不需要任何介质来传播；它甚至可以在真空中发生。这一独特特性使得太阳的能量能够穿越浩瀚的空间到达地球。 governing 热辐射的一个关键原理是斯特藩-玻尔兹曼定律，该定律指出，黑体每单位表面积辐射的总能量与其绝对温度的四次方成正比。这意味着，随着物体温度的升高，它所发出的热辐射量显著增加。例如，一个热炉发出的热辐射远多于一个冷炉，使我们能够在一定距离内感受到温暖。热辐射的另一个重要方面是其与颜色和材料特性的关系。较暗的物体往往吸收更多的热辐射并更有效地发出它，而较浅色的物体则相反。这就是为什么在阳光明媚的日子里，穿深色衣服会让你感觉比穿浅色衣服要热。此外，具有高发射率的材料，如黑漆，与铝箔等光滑表面相比，更擅长辐射热，因为铝箔会反射大部分进入的热辐射。在实际应用中，理解热辐射对于设计节能建筑至关重要。建筑师和工程师通常使用优化热辐射特性的材料来维持舒适的室内温度。例如，双层玻璃窗可以在冬季最大限度地减少不必要的热辐射损失，同时允许阳光在白天自然加热空间。此外，热辐射在气候科学中也发挥着重要作用。地球的大气层吸收和发射热辐射，帮助调节地球的温度。然而，人类活动（如燃烧化石燃料）增加了温室气体的浓度，导致增强的热辐射捕获。这一现象助长了全球变暖和气候变化，因此科学家们研究和理解热辐射如何与环境相互作用至关重要。总之，热辐射是一个基本概念，影响着我们日常生活的许多方面。从我们体验温度变化的方式到节能建筑的设计，再到气候变化的研究，理解热辐射都是必不可少的。通过掌握热辐射的原理，我们可以就能源使用、环境保护甚至个人舒适做出明智的决策。随着我们继续探索物理学和能量传递的奇迹，热辐射仍然是一个值得我们关注和尊重的重要主题。