1.

An object is placed perpendicular to the principal axis of a convex lens of focal length 14 cm.The distance of the object from the lens is 21cm.Find the position and nature of the image formed.

Answer»

f=14cmu=-21cmv= ?1/f=1/v-1/u1/14 - 1/21=1/v1/v = 3-2/421/v =1/42v= 42cm.

m = v/um = 42/-21m= -2Image is real,inverted and enlarged



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