| Study the following diagram and select the correct statement about the device ?X?: |
 |
| (a) Device 'X' is a concave mirror of radius of curvature 12 cm. |
| (b) Device 'X' is a concave mirror of focal length 6 cm. |
| (c) Device 'X' is a concave mirror of focal length 12 cm. |
| (d) Device 'X' is a convex mirror of focal length 12 cm. |
Answer:
(c) Device ?X? is a concave mirror of focal length 12cm.
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