Question

An object 30cm high is placed
perpendicular to the principal axis of a
concave lens of focal length 7.5cm. The
image is formed at a distance of sem from the
lens . Find the distances which the object is
placed and the nature of the image​

Answer 1

distance of object..=15 cm

nature of image-same size,same width,real and inveeted..

Explanation:

if the distance of object and image is same then for sure it is placed on radius of curvature and it is the property of the lens to form image at the same position as that of object if it is placed on radius of curvature..which is

R=2f

R=2*7.5

R=15cm..