free path length

简明释义

自由程

英英释义

例句

1.As temperature increases, the free path length 自由程 of gas molecules generally increases as well.

随着温度的升高，气体分子的自由程 free path length 通常也会增加。

2.The free path length 自由程 of gas molecules can be calculated using the ideal gas law.

气体分子的自由程 free path length 可以通过理想气体定律计算得出。

3.The free path length 自由程 of photons in a medium determines how far they can travel before being absorbed.

光子在介质中的自由程 free path length 决定了它们在被吸收之前可以传播多远。

4.In high-energy physics experiments, understanding the free path length 自由程 is crucial for detecting particles.

在高能物理实验中，理解自由程 free path length 对于探测粒子至关重要。

5.In a vacuum, the free path length 自由程 of particles is significantly increased due to the absence of collisions.

在真空中，粒子的自由程 free path length 由于缺乏碰撞而显著增加。

作文

The concept of free path length is essential in the fields of physics and engineering, particularly when discussing the behavior of particles in various mediums. To understand this term, we must first consider what is meant by 'path length.' In simple terms, path length refers to the distance a particle travels through a medium before it collides with another particle or an obstacle. The free path length, therefore, is the average distance that a particle can travel without experiencing such collisions. This measurement is crucial for predicting how particles will behave in different environments, whether they are gas molecules in the atmosphere or electrons in a conductor.In the study of gases, the free path length helps scientists understand how gas molecules interact with one another. For instance, in a low-pressure environment, gas molecules have a longer free path length because they are more spread out and less likely to collide. Conversely, in high-pressure conditions, the free path length decreases as molecules are packed closer together, resulting in more frequent collisions. This principle is vital in applications such as aerodynamics, where understanding the behavior of air molecules around an object can influence design decisions.Moreover, the free path length is not limited to gases; it also applies to liquids and solids. In liquid solutions, the free path length can affect how quickly a solute dissolves or how efficiently a chemical reaction occurs. For example, in a concentrated solution, the free path length of the solvent molecules is reduced, which can slow down the diffusion process of the solute. Similarly, in solid materials, the free path length of charge carriers like electrons can determine the electrical conductivity of the material. A longer free path length usually correlates with higher conductivity, as there are fewer obstacles impeding the flow of charge.Understanding free path length also has implications in the field of radiation physics. When considering how radiation interacts with matter, the concept of free path length becomes critical in determining how far radiation can penetrate a material before being absorbed or scattered. This knowledge is particularly useful in medical applications, such as radiation therapy, where precise calculations are required to ensure that cancer cells are targeted effectively while minimizing damage to surrounding healthy tissue.In conclusion, the free path length is a fundamental concept that plays a significant role in various scientific disciplines. By measuring the average distance a particle can travel without colliding, researchers can gain valuable insights into the behavior of particles in different states of matter. Whether it is in the study of gases, liquids, solids, or radiation, understanding the free path length allows scientists and engineers to make informed predictions and decisions that can impact technology, health, and our understanding of the natural world. As we continue to explore the intricacies of matter and energy, the significance of free path length will undoubtedly remain a key area of focus.

“自由路径长度”这一概念在物理学和工程学领域中至关重要，特别是在讨论粒子在各种介质中的行为时。要理解这个术语，我们首先必须考虑“路径长度”的含义。简单来说，路径长度是指粒子在与其他粒子或障碍物碰撞之前通过某一介质所行进的距离。因此，“自由路径长度”就是粒子在没有经历这些碰撞的情况下可以行进的平均距离。这一测量对于预测粒子在不同环境中的行为至关重要，无论它们是大气中的气体分子还是导体中的电子。在气体研究中，“自由路径长度”帮助科学家理解气体分子之间的相互作用。例如，在低压环境中，气体分子的“自由路径长度”较长，因为它们分布得较为稀疏，不太可能发生碰撞。相反，在高压条件下，由于分子更紧密地聚集在一起，导致碰撞频率增加，从而“自由路径长度”减小。这一原理在空气动力学等应用中至关重要，了解物体周围空气分子的行为可以影响设计决策。此外，“自由路径长度”并不仅限于气体；它同样适用于液体和固体。在液体溶液中，“自由路径长度”可以影响溶质的溶解速度或化学反应的效率。例如，在浓缩溶液中，溶剂分子的“自由路径长度”减少，这可能会减缓溶质的扩散过程。同样，在固体材料中，电荷载流子（如电子）的“自由路径长度”可以决定材料的电导率。通常情况下，较长的“自由路径长度”与较高的电导率相关，因为有较少的障碍物阻碍电荷的流动。理解“自由路径长度”在辐射物理学领域也具有重要意义。当考虑辐射与物质的相互作用时，“自由路径长度”这一概念在确定辐射可以在材料中穿透多远之前被吸收或散射时变得至关重要。这一知识在医疗应用中尤其有用，例如在放射治疗中，精确的计算是确保癌细胞有效靶向，同时最小化对周围健康组织损伤的关键。总之，“自由路径长度”是一个基本概念，在各个科学学科中发挥着重要作用。通过测量粒子在未发生碰撞的情况下能够行进的平均距离，研究人员可以深入了解粒子在不同物态中的行为。无论是在气体、液体、固体还是辐射的研究中，理解“自由路径长度”使科学家和工程师能够做出明智的预测和决策，这些预测和决策可能会影响技术、健康以及我们对自然世界的理解。随着我们继续探索物质和能量的复杂性，“自由路径长度”的重要性无疑将继续成为一个关键的研究领域。