Optics Ques 189
- 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
$(1998,2 M)$
(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 $O$
Show Answer
Answer:
Correct Answer: 189.(d)
Solution:
Formula:
Refraction at Spherical Surfaces:
- The ray diagram is shown in figure. Therefore, the image will be real and between $C$ and $O$.
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