. A convex lens can form a magnified erect as well as magnified inverted image of an object placed in front of it
Draw ray diagram to justify this statement stating the position of the object with respect to the lens in each case.
An object of height 4 cm is placed at a distance of 20 cm from a concave lens of focal length 10 cm. Use lens formula to determine the position of the image formed.
Best Answer
Ans. A convex lens can form a magnified erect image when the object is placed between the optical centre and principal focus of the convex lens (i.e., between 0 and F').
A convex lens can form a magnified inverted image when the object is placed between focus and the centre of curvature (i.e., between F' and 2F').
Object height h = 4 cm
Object distance u = -20 cm
Nature of the lens = concave lens
Focal length = f = +10 cm
Image distance v = ?
The image is formed at a distance of 20 cm from the lens on the opposite side
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