A convex lens forms a real image 9 cm long (high) on a screen. Without altering the position of the object and the screen, the lens is displaced and we get again a real image 4 cm long(high) on the screen. Then the length of the object is-
Text Solution
Verified by ExpertsThe correct answer is:
C
From displacement method
O = 
O = 
= 6 cm
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