Question

A concave mirror is placed on a horizontal table, with its axis directed vertically upward. Let $O$ be the pole of the mirror and $C$ its center 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. Real, and will remain at $C$
• B. Real, and located at a point between $C$ and $\infty$
• C. Virtual, and located at a point between $C$ and $O$
• D. Real, and located at a point between $C$ and $O$

Answer 1

The correct option is D Real, and located at a point between $C$ and $O$

The ray diagram is shown in the figure. Therefore, the image will be real and between $C$ and $O$.