Optics 1 Question 13
13. A thin rod of length is placed along the optic axis of a concave mirror of focal length such that its image which is real and elongated, just touches the rod. The magnification is ……
(1991, 1M)
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Answer:
Correct Answer: 13.
Solution:
focus, centre of curvature
When the object lies between
Let
For
Applying the mirror formula
Here, negative sign implies that image is inverted.