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(A) : The minimum distance between an object
and its real image formed by a convex lens
is 4f.
(R) : The distance between an object and its real
image is minimum when its magnification
is one.

see full answer

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Both 'A' and 'R' are true and 'R' is not the correct explanation of 'A'

Both 'A' and ‘R’ are false

A' is true and 'R' is false

Both 'A' and 'R' are true and 'R' is the correct explanation of 'A'.

answer is B.

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Detailed Solution

For a convex lens, the minimum distance between an object and its real image occurs when the object is at 2f. At this position, the image is also formed at 2f on the other side. Therefore, the distance between object and image is:

D_min = u + v = 2f + 2f = 4f

So, both the assertion and reason are true, and the reason correctly explains the assertion.

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