Final answer:
The reflected light in a plane mirror will travel along path 1: W.
Step-by-step explanation:
The path of the reflected light in a plane mirror is option 1: W. When light is incident on a plane mirror, it is reflected in a way that the angle of incidence is equal to the angle of reflection. This means that the reflected ray will travel in a path opposite to the incident ray, forming the letter 'W' as shown in the diagram.