at which point does the image appear?\no w\no x\no y\no z

Explanation:

Step1: Recall reflection principle

In a plane - mirror like situation (assuming the curved surface acts in a way that we can apply basic reflection concepts), the image appears to be behind the mirror at a position such that the object and the image are equidistant from the mirror surface along the normal to the mirror surface at the point of incidence. When we trace the reflected ray back, the virtual image is formed at the point where the extended reflected ray and the normal from the object to the mirror intersect. In this case, when we consider the light rays coming from the object (the light - bulb) and reflecting off the surface, the image appears to be at the point where the reflected rays seem to originate from behind the surface.

Step2: Analyze ray tracing

By extending the reflected ray backwards, we find that the image appears at point X. This is because the light rays from the object reflect off the surface and our eyes trace these rays back as if they are coming from point X.

Answer:

X