A convex lens is a transparent optical device with curved surfaces that converges light rays, causing them to meet at a focal point. It is used in magnifying glasses, cameras, and eyeglasses.
A 4 cm tall object is placed perpendicular to the principal axis of a convex lens of focal length 20 cm. The distance of the object from the lens is 15 cm. Find the nature, position and the size of the image formed.
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Given, u = -15 cm, f= 20 cm, v =?
Using lens formula, 1/v – 1/u = 1/f
1/v = – 1/60
V = – 60 cm
m = hi/ho = v/u
hi = 16 cm
Image formed is virtual, erect and magnified.