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QUESTION
A converging lens has focal length of 12 cm. calculate at what distance the object should should be placed from the lens so that it forms an image at 48 cm on the other side of the lens?
answer is 16 if an object is placed at 16 cm on one side of the convex lens of focal length 12 the real,inverted image is formed on the other side at 48cm
You can use the Lens Equation and some Ray Tracing:
