Question

an object is placed at a distance of 12 cm from a convex lens of focal length 8 cm find the position of the image and nature of the image

Answer 1

1/f=1/u+1/v

u=-12
f=-8

1/-8+1/12=1/v
-12+8/96=1/v
-4/96=1/v
-24=v

-24cm in front of the mirror

Real, inverted and magnified


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Answer 2

Answer: V=24cm

Image is diminished

Explanation:

Since, f=8cm

u=-12cm(since it is a convex lens)

1/f= 1/v -1/u

~. 1/8 = 1/v - (-1/12)

~ v= 24cm

And

m=v/u

~ m=24/-12

=-2

Hence magnification is -2 thus image is diminished.