Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. A point particle (ideal particle or point-like particle, often spelled pointlike particle) is an idealized object 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. Particular "types" of point particles include point masses and point charges, point particles whose only attributes are their mass and charges respectively.
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