Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): The real image formed by a convex lens, of an object placed between \(f\) and \(2f\), is still there when no screen is placed at the image location.
Reason (R): A screen must be placed at the image location for the rays from a point on the object to meet at the image point.
In the light of the above statements, choose the most appropriate answer from the options given below:
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → (A) is correct but (R) is not correct.
Assertion (A) The real image formed by a convex lens, of an object placed between \(f\) and \(2f\), is still there when no screen is placed at the image location. — True. Rays from a point on the object converge to the image point in space and then spread out again. The image exists in the air, as seen in the images formed during a laser show.
Reason (R) A screen must be placed at the image location for the rays from a point on the object to meet at the image point. — False. The rays meet at the image point whether a screen is there or not. A screen only scatters (diffuses) these rays, so that some of them reach our eye.
NCERT (2026-27):
Points to Ponder – “… But the image does exist. Rays from a given point on the object are converging to an image point in space and diverging away. The screen simply diffuses these rays, some of which reach our eye and we see the image. This can be seen by the images formed in air during a laser show.”