A Bravais lattice is a mathematical concept used in crystallography to describe the arrangement of points in space that form a periodic structure. It consists of a set of discrete points that are arranged in a repeating pattern, which can represent the positions of atoms in a crystal. There are 14 distinct types of Bravais lattices in three-dimensional space, categorized into seven crystal systems based on their symmetry and dimensions. Each Bravais lattice is defined by its lattice vectors, which determine the distances and angles between the points. These lattices help scientists understand the properties of materials, including their symmetry, density, and how they interact with light and other forms of energy. Understanding Bravais lattices is essential for studying solid-state physics and materials science.