Final answer:
Light travels in the form of straight lines called rays, as described by the ray model of light.
Step-by-step explanation:
The ray model of light states that light travels in the form of straight lines called rays. The ray model of light describes the path of light as straight lines, which can change direction when it encounters objects or passes from one material to another. Light can travel directly from the source through empty space, through various media, or after being reflected by a mirror.