doppler halfwidth

简明释义

多普勒半宽度

英英释义

例句

1.The measurement of the Doppler halfwidth is crucial for determining the speed of stars in a galaxy.

测量Doppler halfwidth对于确定星系中恒星的速度至关重要。

2.The Doppler halfwidth of the spectral lines can provide insight into the turbulence of the gas in a nebula.

光谱线的Doppler halfwidth可以提供关于星云中气体湍流的见解。

3.By analyzing the Doppler halfwidth, we can infer the velocity distribution of particles in a plasma.

通过分析Doppler halfwidth，我们可以推断等离子体中粒子的速度分布。

4.In our recent study, we found that the Doppler halfwidth can vary significantly with temperature changes.

在我们最近的研究中，我们发现Doppler halfwidth会随着温度变化而显著变化。

5.Astronomers use the Doppler halfwidth to estimate the mass of black holes by observing their effect on nearby stars.

天文学家通过观察黑洞对附近恒星的影响，使用Doppler halfwidth来估计黑洞的质量。

作文

The concept of doppler halfwidth is crucial in various fields of physics and engineering, particularly in spectroscopy and the analysis of spectral lines. It refers to the width of a spectral line at half of its maximum intensity, which is influenced by the Doppler effect. The Doppler effect occurs when there is a relative motion between a source of waves and an observer, causing a shift in the frequency of the waves. As the source approaches, the waves are compressed, leading to a higher frequency or blue shift; conversely, as it moves away, the waves are stretched, resulting in a lower frequency or red shift.In spectroscopy, understanding the doppler halfwidth is essential for interpreting the characteristics of light emitted or absorbed by atoms and molecules. When atoms are in motion, their emitted light will exhibit a spread in wavelengths due to this effect. The extent of this spread can be quantified using the doppler halfwidth, which provides insights into the velocity distribution of the emitting particles.For instance, in astrophysics, scientists analyze the light from distant stars and galaxies to determine their movement relative to Earth. By measuring the doppler halfwidth of spectral lines, they can infer the speed at which these celestial bodies are moving. A larger doppler halfwidth indicates a greater range of velocities among the emitting particles, suggesting turbulence or high-speed motion, while a narrower width may imply a more stable environment.Moreover, the doppler halfwidth can also be affected by factors such as temperature and pressure. Higher temperatures can lead to increased kinetic energy among particles, resulting in a broader doppler halfwidth. Similarly, changes in pressure can alter the density of particles, influencing the overall spectral line shape. This relationship makes the doppler halfwidth a valuable parameter in various applications, including remote sensing and environmental monitoring.In practical applications, engineers and scientists utilize the doppler halfwidth to enhance technologies such as laser systems and communication devices. For example, in laser spectroscopy, precise measurements of the doppler halfwidth allow for accurate identification of chemical species and their concentrations in a sample. This is particularly important in fields like atmospheric science, where understanding trace gases is vital for climate studies.In conclusion, the doppler halfwidth is a fundamental concept that bridges various scientific disciplines. Its implications extend from understanding the universe's dynamics to practical technological advancements. By mastering the concept of doppler halfwidth, researchers can unlock deeper insights into both the micro and macro aspects of our world, making it an invaluable tool in scientific inquiry and innovation.

“doppler halfwidth”的概念在物理学和工程学的多个领域中至关重要，特别是在光谱学和光谱线分析中。它指的是光谱线在其最大强度一半处的宽度，这受到多普勒效应的影响。多普勒效应发生在波源与观察者之间存在相对运动时，导致波的频率发生偏移。当源靠近时，波被压缩，导致频率增高或蓝移；相反，当源远离时，波被拉伸，导致频率降低或红移。在光谱学中，理解doppler halfwidth对于解释原子和分子发射或吸收的光的特性至关重要。当原子处于运动状态时，它们发出的光将由于这一效应而表现出波长的扩展。这个扩展的程度可以通过doppler halfwidth量化，为发射粒子的速度分布提供了见解。例如，在天体物理学中，科学家分析来自遥远恒星和星系的光，以确定它们相对于地球的运动。通过测量光谱线的doppler halfwidth，他们可以推断这些天体的运动速度。较大的doppler halfwidth表示发射粒子之间的速度范围更大，暗示湍流或高速运动，而较窄的宽度则可能意味着环境更稳定。此外，doppler halfwidth还可能受到温度和压力等因素的影响。较高的温度会导致粒子之间的动能增加，从而导致更宽的doppler halfwidth。类似地，压力变化可以改变粒子的密度，从而影响整体光谱线形状。这种关系使得doppler halfwidth在各种应用中成为一个有价值的参数，包括遥感和环境监测。在实际应用中，工程师和科学家利用doppler halfwidth来增强激光系统和通信设备等技术。例如，在激光光谱学中，对doppler halfwidth的精确测量允许准确识别样品中的化学物质及其浓度。这在大气科学等领域尤为重要，因为了解微量气体对于气候研究至关重要。总之，doppler halfwidth是一个基本概念，连接着多个科学学科。它的影响从理解宇宙的动态到实际的技术进步。通过掌握doppler halfwidth的概念，研究人员可以深入洞察我们世界的微观和宏观方面，使其成为科学探究和创新中不可或缺的工具。