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To do this, you need to understand how you see your reflection at all.
Light from the surrounding area falls on a mirror surface (usually a thin layer of metal), bounces off it, and hits your retina.
So your image on the glass is the light reflected from the metal surface.
If we approach this question from the point of view of physics (and the question is also placed in this section), then there are no discrepancies here. Geometric optics uniquely allows you to find the image of an object (reflection) from a mirror of any shape. The location of the image, its size and orientation depend on this form.
In the case of a flat mirror, the image is behind the mirror, not on top of it! This is easy to check: draw a small dot on the surface of the mirror and stand in front of it. When you focus on a point, your image will be behind it. And when you look at your reflection, the point will be out of focus, and therefore blurred. Moving your gaze from the point to your reflection, you “readjust” to look at a more distant object.
The same is true for a convex mirror and for a concave one, if the object is located at a distance less than the focal distance.
But the image of the object in a concave mirror is located in front of the mirror surface (except for the case when the object is placed in front of the mirror at a distance less than the focal one). For this reason, in a concave mirror, the reflection is blurred: our eyes cannot find the object of focus.