A student obtained a sharp inverted image of a distant tree on a screen placed in front of the concave mirror. He then removed the screen and tried to look into the mirror. He would now see:

Since the image of the distant tree was obtained on the screen, it is clear that the screen was placed at the focus of the mirror. The image obtained at the focus of a concave mirror of a distant object is diminished and inverted. Hence, the student would also observe the same when he replaces the screen with his eyes.