A short linear object of length b lies along the axis of a concave mirror of focal length f at a distance u from the pole of the mirror, what is the size of image?
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
Using mirror formula
…… . (i)
On differentiating Eq. (i), we get 
…… . (ii)
From Eq. (i),
……… (iii)
Now from Eqs. (ii) and (iii).
Therefore, size of image 
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