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A concave mirror is placed on a horizont...

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

Real, at C

B

Real, located beyond C

C

Virtual, beyond C

D

Real an located before C

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The correct Answer is:
D
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