luminosity

简明释义

英[ˌluːmɪˈnɒsəti]美[ˌluːmɪˈnɑːsəti]

n. [光][天] 光度；光明；光辉

复 数 l u m i n o s i t i e s

英英释义

单词用法

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例句

1.If luminosity were a true indicator of mass, most of the mass would be concentrated toward the center.

如果亮度标志着质量，那么大部分质量就应该集中在星系的中心。

2.In this situation astronomers tacitly assume that stars of the same luminosity and color all have the same mass.

在目前的状况下，天文学家心照不宣地默认，光度和颜色都相同的恒星具有相同的质量。

3.Ignis fatuus is a luminosity that appears over swamps or marshes at night.

鬼火是一种夜间出现在沼泽里或沼泽上的发光体。

4.Astronomers tried to estimate what solar mass could produce the required luminosity to explain liquid water on these planets.

天文学家试图通过估计太阳质量能产生多少必需的光来解释这些行星上的液态水。

5.The luminosity of the burning droplets is measured directly with photodiodes.

燃烧油滴的辉光度直接用光电二极管测量。

6.There's no way he could ever have John's amazing luminosity.

让他拥有约翰那种令人惊异的发光度显然是不可能的。

7.The scientist measured the star's luminosity to determine its distance from Earth.

科学家测量了这颗星星的光度以确定它与地球的距离。

8.In photography, adjusting the luminosity can enhance the brightness of an image.

在摄影中，调整亮度可以增强图像的明亮度。

9.The luminosity of the moon was particularly bright that night.

那晚月亮的光辉特别明亮。

10.Astronomers use luminosity to classify different types of stars.

天文学家使用光度来分类不同类型的星星。

11.The luminosity of a light bulb is measured in lumens.

灯泡的亮度是以流明为单位测量的。

作文

In the vast realm of astronomy, the concept of luminosity (光度) plays a crucial role in understanding celestial bodies. Luminosity refers to the total amount of energy emitted by a star, galaxy, or any other astronomical object per unit of time. This measurement is essential for astronomers as it allows them to determine the intrinsic brightness of these objects, independent of their distance from Earth. For instance, two stars may appear equally bright in the night sky, but their actual luminosity (光度) could be vastly different based on how far away they are from us. The study of luminosity (光度) not only helps in categorizing stars but also provides insights into their life cycles. More massive stars tend to have higher luminosity (光度) levels and burn through their nuclear fuel at a faster rate. Consequently, they have shorter lifespans compared to smaller stars. This relationship between mass and luminosity (光度) is encapsulated in the mass-luminosity relationship, a principle that has significant implications in stellar evolution theories. Moreover, luminosity (光度) can also be used to gauge distances in the universe. By comparing the apparent brightness of a star with its known luminosity (光度), astronomers can calculate how far away the star is. This technique is particularly useful when studying distant galaxies and supernovae. For example, Type Ia supernovae, which have a consistent luminosity (光度), serve as standard candles in cosmology, helping scientists measure the expansion of the universe. In addition to its astronomical significance, the term luminosity (光度) is also relevant in other fields such as photography and lighting design. In these contexts, luminosity (光度) refers to the brightness of light sources and is crucial for creating visually appealing images or spaces. Understanding how luminosity (光度) affects perception can help photographers choose the right settings for their cameras, while interior designers can manipulate luminosity (光度) to enhance the ambiance of a room. Furthermore, the concept of luminosity (光度) extends beyond the physical sciences into metaphorical applications. For instance, one might describe a person's personality as having a certain luminosity (光度), suggesting that they possess a vibrant and engaging presence. This figurative use of luminosity (光度) highlights the versatility of the term across different contexts. In conclusion, luminosity (光度) is a multifaceted concept that encompasses various disciplines, from astronomy to art. Its importance in measuring the brightness of stars and understanding the universe cannot be overstated. As we continue to explore the cosmos and develop new technologies, the study of luminosity (光度) will undoubtedly remain a fundamental aspect of both scientific inquiry and creative expression.

在天文学的广阔领域中，luminosity（光度）这一概念在理解天体方面发挥着至关重要的作用。Luminosity指的是恒星、星系或任何其他天文物体每单位时间发出的总能量。这一测量对于天文学家来说至关重要，因为它使他们能够确定这些物体的内在亮度，而不受其与地球距离的影响。例如，两颗恒星在夜空中看起来同样明亮，但它们的实际luminosity（光度）可能由于离我们距离的不同而大相径庭。 对luminosity（光度）的研究不仅有助于对恒星进行分类，还提供了关于其生命周期的深入见解。更大质量的恒星往往具有更高的luminosity（光度）水平，并以更快的速度消耗其核燃料。因此，它们的寿命比小恒星短。这种质量与luminosity（光度）之间的关系被称为质量-光度关系，这一原理在恒星演化理论中具有重要意义。 此外，luminosity（光度）还可以用于测量宇宙中的距离。通过比较恒星的表观亮度与其已知的luminosity（光度），天文学家可以计算出恒星的距离。这种技术在研究遥远的星系和超新星时尤其有用。例如，类型Ia超新星具有一致的luminosity（光度），作为宇宙学中的标准烛光，帮助科学家测量宇宙的膨胀。 除了在天文学上的重要性，术语luminosity（光度）在摄影和照明设计等其他领域也很相关。在这些背景下，luminosity（光度）指的是光源的亮度，对于创造视觉上吸引人的图像或空间至关重要。理解luminosity（光度）如何影响感知，可以帮助摄影师选择相机的正确设置，而室内设计师则可以操控luminosity（光度）来增强房间的氛围。 此外，luminosity（光度）的概念超越了物理科学，延伸到比喻应用。例如，人们可能会将一个人的个性描述为具有某种luminosity（光度），暗示他们拥有生动而迷人的存在。这种比喻性的使用突显了该术语在不同上下文中的多功能性。 总之，luminosity（光度）是一个多面的概念，涵盖了从天文学到艺术的各种学科。它在测量恒星的亮度和理解宇宙中的重要性不容小觑。随着我们继续探索宇宙并开发新技术，luminosity（光度）的研究无疑将继续作为科学探究和创造性表达的基本方面。