Question
Study the following diagram and select the correct statement about the device ‘X’:
-
Device 'X' is a concave mirror of radius of curvature 12 cm
-
Device 'X' is a concave mirror of focal length 6 cm
-
Device 'X' is a concave mirror of focal length 12 cm
-
Device 'X' is a convex of mirror of focal length 12 cm
Solution
C.
Device 'X' is a concave mirror of focal length 12 cm
Correct option is C.
From the figure, we can see that the light rays coming from infinity get reflected by the device 'X' and converge at a point at a distance 12 cm from it. Therefore, the device 'X' is a concave mirror of focal length 12 cm.
