SH 452 · Chapter 5
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Two thin converging lenses of focal lengths 3 cm and 4 cm are placed coaxially in air separated by a distance of 2 cm. An object is placed 4 cm in front of the lens. Calculate the final position and nature of the image.
Show that the distance between an object and its real image formed by a thin converging lens is always greater than or equal to four times the focal length of the lens.
Two thin converging lenses of focal lengths 30 cm and 40 cm respectively are placed co-axially in air separated by a distance of 20 cm. An object is placed 40 cm in front of the first lens. Find the position and nature of the image.