Question:medium

Which one of the sets of observations is not correct and why?

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In ray diagrams for convex lenses, light rays diverging from an object parallel to the optical axis are refracted through the focal point on the opposite side.
Updated On: Jan 31, 2026
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Solution and Explanation

- Observation (2) indicates an image distance of +20 cm with an object distance of -60 cm, which is inconsistent. A convex lens should produce an image at a greater distance when the object is further away. The expected behavior is for the image to approach the focal point as the object distance decreases. Therefore, observation (2) appears to be inaccurate.

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