Optics 7 Question 16

16. 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 and will remain at C

(b) real and located at a point between C and

(1998,2M)

(c) virtual and located at a point between C and O

(d) real and located at a point between C and O

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Solution:

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



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