A concave mirror is placed on a horizontal table with its axis directed vertically upwards.Let O be the pole of the mirror and C its centre of curvature.A point object is placed at C. It has a real image, also located at C.If the mirror is now filled with water, the image will be

A concave mirror is placed on a horizontal table with its axis directed vertically upward. Let O be the pole of the mirror C its center of curvature and F is the focus. A point object is placed at C. It has a real image, also located at C. If the mirror is now filled with water, the image will be

Mgnification of concave mirror when the object is placed at the centre of curvature

When an object is placed between the focus and the pole of a concave mirror, the image formed is