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Answer 1

Answer:

Let’s say you have a toy car, and it’s sitting in front of a regular bathroom mirror. The distance between the car and mirror is called the object distance, and it’s always positive. If you look at the image of the toy car in the mirror, it will appear to be the same distance behind the mirror as the real car is in front of the mirror, at the same height. It will also appear to be the same size as the real car. The image of the car looks like it’s behind the mirror (and the light we see does not directly emerge from the image), we say that the image is upright and virtual, and that the image distance is negative.

Explanation:

Spherical convex mirrors

Convex mirrors that are shaped like part of a sphere or circle, just like plane mirrors, always have a virtual image: the image always looks like it is on the other side of the mirror, and the image distance is always negative. Light rays that come towards the mirror from far away are essentially parallel, but when they hit the mirror they are reflected in all directions. However, there is a virtual focal point on the other side of the mirror if we follow them back into the mirror. The whole setup looks something like this:

Convex mirror with parallel light rays being reflected to a virtual focus