. 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 curva


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 (a condition called auto-collimation). 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
  • (C):virtual, and located at a point between C and O.
  • (D):real, and located at a point between C and O.

Best Answer

Correct Answer:

(D): real, and located at a point between C and O.

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