A small wire piece of length 2 mm is bent in the form of shape L and is placed at 30 cm away in front of a concave mirror of focal length 20 cm. If both sides of L are equal then length of image formed will be -
Text Solution
Verified by ExpertsThe correct answer is:
C
Transverse magnification
m = 
= 
= –2
Longitudinal/Axial magnification
m ′ = – m 2 = – 4
∴ Length of image = (1 × 2) + ( 1 × 4) = 6 mm
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