The object is moved from infinity to the focus of the concave mirror along the main optical axis. How will the image of the object move and what will it be with different positions of the object and the mirror?
When the subject is at infinity, the image is in the focus of the mirror as a point. As the subject moves towards the mirror, the image moves out of focus away from the mirror and enlarges. It is real, inverted. When the subject is between infinity and the center of the mirror, the image is zoomed out. When the subject is placed in the center of the mirror, the image is in the center and equal to the subject. When the subject is in focus, there is no image of the subject; rays coming from each point of the object are reflected from the mirror in the form of parallel rays.
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