thermal radiation

简明释义

热辐射

英英释义

例句

1.The greenhouse effect is largely due to the trapping of thermal radiation 热辐射 by gases in the atmosphere.

温室效应主要是由于气体在大气中捕获热辐射 热辐射。

2.Infrared cameras are designed to detect thermal radiation 热辐射 from objects.

红外相机旨在探测物体发出的热辐射 热辐射。

3.In space, all objects lose heat through thermal radiation 热辐射 since there is no air.

在太空中，由于没有空气，所有物体通过热辐射 热辐射失去热量。

4.The sun emits a significant amount of thermal 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。

5.Buildings are often designed with materials that reflect thermal radiation 热辐射 to improve energy efficiency.

建筑物通常采用反射热辐射 热辐射的材料来提高能效。

作文

Thermal radiation is a fundamental concept in physics that refers to the electromagnetic radiation emitted by all objects based on their temperature. Every object, regardless of its size or material composition, emits thermal radiation when it is above absolute zero. This phenomenon can be observed in everyday life; for instance, when we feel the warmth of the sun on our skin, we are experiencing the effects of thermal radiation (热辐射). The process of thermal radiation (热辐射) occurs because the atoms and molecules within an object are in constant motion. As these particles move, they generate electromagnetic waves, which carry energy away from the object. The amount and type of thermal radiation (热辐射) emitted depend on the temperature of the object and its emissivity, a measure of how efficiently it radiates energy compared to a perfect black body. A perfect black body is an idealized physical object that absorbs all incident radiation, regardless of frequency or angle of incidence. In reality, no material is a perfect black body, but some materials come close. For example, carbon black and certain metals exhibit high emissivity and thus emit significant amounts of thermal radiation (热辐射) at elevated temperatures. The Stefan-Boltzmann Law quantifies the relationship between an object's temperature and the power of thermal radiation (热辐射) it emits. According to this law, 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 even a small increase in temperature results in a large increase in emitted thermal radiation (热辐射). In practical applications, understanding thermal radiation (热辐射) is crucial in various fields, including engineering, environmental science, and astronomy. For instance, in engineering, designers must consider thermal radiation (热辐射) when creating heating systems or thermal insulation materials. In environmental science, the study of thermal radiation (热辐射) helps us understand the Earth's energy balance and the effects of climate change. In astronomy, thermal radiation (热辐射) plays a vital role in studying celestial bodies. Stars, for example, emit vast amounts of energy through thermal radiation (热辐射), and astronomers analyze this radiation to determine the stars' temperatures, compositions, and distances from Earth. The cosmic microwave background radiation, a remnant from the Big Bang, is another example of thermal radiation (热辐射) that provides insights into the early universe. In conclusion, thermal radiation (热辐射) is a key principle that underlies many natural phenomena and technological applications. By understanding how thermal radiation (热辐射) works, we can better appreciate the world around us and make informed decisions in various scientific and engineering disciplines. As we continue to explore and innovate, the principles of thermal radiation (热辐射) will undoubtedly remain integral to our advancements in technology and our understanding of the universe.