Question

The minimum distance between am object and it's real image formed by a thin convex lens.
(a) 4f
(b) less than 4f
(c) more than 4f
(d) not definite​

Answer 1

Answer:

Explanation: In a convex lens of focal length f the minimum distance between an object and its real image must be

Ray Optics and Optical Instruments. Show that the least possible distance between an object and its real image in a convex lens is 4f where f is the focal length of the lens. ... Hence, 4f is the minimum distance between the object and its real image formed by a convex lens.

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Answer 2

Answer:

Ray Optics and Optical Instruments. Show that the least possible distance between an object and its real image in a convex lens is 4f where f is the focal length of the lens. ... Hence, 4f is the minimum distance between the object and its real image formed by a convex lens.

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