No, light is not one-dimensional. Light is an electromagnetic wave that propagates in three-dimensional space. It consists of oscillating electric and magnetic fields that are perpendicular to each other and perpendicular to the direction of wave propagation. This wave nature allows light to travel in all directions and interact with objects and the environment in a three-dimensional manner.
The behavior of light is described by Maxwell's equations, which are a set of mathematical equations that govern the behavior of electromagnetic waves. These equations account for the three-dimensional nature of light and describe how the electric and magnetic fields vary in space and time.
It's worth noting that light can be represented by a one-dimensional line in certain simplified diagrams or models to illustrate certain aspects of its behavior. For example, in ray diagrams used in optics, light rays are represented as one-dimensional lines to show their paths of propagation. However, this representation is a simplification and does not reflect the full three-dimensional nature of light.