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单词 Point object
释义

Point object

原声例句
Mosh带你学编程

So earlier we typed point.x equals 10, with this code we set the x attribute of this point object.

所以之前我们输入 point. x 等于 10,使用这段代码我们设置了这个点对象的 x 属性。

Veritasium真理元素

So like a figure skater pulling their arms into a... point object, You can imagine black holes get spinning pretty fast.

这像一个花样滑冰运动员如果能将手臂缩成。。一小点,你应该可以想象出黑洞自旋会很快的。

Veritasium真理元素

Well first, let's think of how we measure the size of anything far away from us in deep space, like the radius of a star Most stars are so far away that they're simply point objects in our telescopes.

首先,让我们先来讨论一下我们是如何测量出任何远离我们物体的大小的。如莫颗恒星的半径大多数恒星在我们地球上的望远镜中看上去就是一个小点。

中文百科

点粒子 Point particle

(重定向自Point object)
点质量的实际范例。灰色部分的质量可以简化成一个点质量。
Scalar potential of a point charge shortly after exiting a dipole magnet, moving left to right.
A proton is a combination of two up quarks and one down quark, held together by gluons.

点粒子是物理里头常使用的一种粒子理想化的概念。 其主要的特色是维度为零,不占有空间。 当情况在与物体的大小、形状、结构无关时,点粒子是一个合适的描述。 举例而言,只要离得够远,形状任意的物体都会看似于一个点。

在讨论重力时,物理学家习惯用一个「点质量」去描述一个具有质量但不具有结构的粒子。 类似的情况,在电磁作用中「点电荷」代表一个带电荷的粒子。

有时由于特殊的组成性质,即使相距不远,物体仍可视作为点粒子。 例如一个其交互作用遵守平方反比定律的球形物体,它的作用等同全部的物质集中在球心的点上。 在牛顿重力和古典电磁学中,在球面之外的场等同一个位于球心的具有相同质量/电荷的点粒子产生的场。

英语百科

Point particle 点粒子

(重定向自Point object)
An example of a point mass graphed on a grid. The grey mass can be simplified to a point mass (the black circle). It becomes practical to represent point mass as small circle, or dot, as an actual point is invisible.
Scalar potential of a point charge shortly after exiting a dipole magnet, moving left to right.
A proton is a combination of two up quarks and one down quark, held together by gluons.

A point particle (ideal particle or point-like particle, often spelled pointlike particle) is an idealization of particles heavily used in physics. Its defining feature is that it lacks spatial extension: being zero-dimensional, it does not take up space. A point particle is an appropriate representation of any object whose size, shape, and structure is irrelevant in a given context. For example, from far enough away, an object of any shape will look and behave as a point-like object.

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更新时间:2025/6/20 6:53:17