I am currently working an a magic system that involves Photokinesis. However, I am having difficulty understanding its limits and its capabilities.
The best definition for this type of magic comes from Fandom:
Light Manipulation - The user can create, shape and manipulate visible light, commonly referred to as light, is electromagnetic radiation that is visible to the human eye, and is responsible for the sense of sight.
Primary properties of visible light are intensity, propagation direction, frequency or wavelength spectrum, and polarization, while its speed in a vacuum (299,792,458 meters per second/186,000 MPS) is one of the fundamental constants of nature. Visible light, as with all types of electromagnetic radiation (EMR), is experimentally found to always move at this speed in a vacuum.
In common with all types of EMR, visible light is emitted and absorbed in tiny "packets" called photons and exhibits properties of both waves and particles. This property is referred to as the wave–particle duality. The study of light, known as optics, is an important research area in modern physics.
The area I am having an issue with is how any kind of light can affect matter, like a small rock.
Question: Can light manipulate matter in any other way beyond its temperature? Can light move matter, like it does with DC's Green Lantern's ring?
The capabilities and limitations of this Magic ability are important to me, because the magic system I am making is supposed to follow the laws of physics as closely as I can make it.