A linear object is placed along the axis of a mirror as shown in the figure. Iff is the focal length of the mirror, then the length of the image is
A
B
f
C
D
none
Text Solution
Verified by ExpertsThe correct answer is:
B
f
The image of object at 2f will be formed at 2f. So the object and image will coincide at 2f.
Length of image = 3f - 2f = f
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