A convex lens makes a real image 4 cm long on a screen when the lens is shifted to a new position without disturbing the object, we again get a real image on screen which is 16 cm tall. The length of the object must be:
A
B
8 cm
C
12 cm
D
20 cm
Text Solution
Verified by ExpertsThe correct answer is:
B
According to displacement method
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