CBSE 2025, Compartment, Set 1

Question

Assertion (A): The image of an object placed between $f$ and $2f$ from a convex lens can be seen on a screen. If the screen is removed, image is not formed.
Reason (R): Rays from a given point on the object placed between $f$ and $2f$, after passing through a convex lens, do not converge on a point in space.

Select the correct option: A). Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A). B). Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A). C). Assertion (A) is true, but Reason (R) is false. D). Both Assertion (A) and Reason (R) are false.

Edvaya · Accepted Answer

The correct answer is Both Assertion (A) and Reason (R) are false.. **SOLUTION** **Assertion (A) is False:** An object physically placed between $f$ and $2f$ of a convex lens definitively produces a real image on the other side. This image forms purely in space where the physical rays converge. Even if a screen is removed, the physical real image is still formed in free space. **Reason (R) is False:** As explained, the rays actually do converge strictly at a point in space (beyond $2f$) to form the real image. Thus, both the assertion and reason are incorrect.

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Physics > Optics > Ray Optics And Optical Instruments

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