Answer to Question #17911 in Optics for mero coactail

Question #17911

A 9 cm high image of an object is formed on a screen by a convex lens. When the lens is displaced towards the screen, again a 4 cm high image is formed on the screen. what is the height of the object? .....a)6cm

b)6.25cm

c)6.5cm

d)non of these

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