Question

If an object of 7cm height is placed at a distance of 12cm from a convex lens of focal length 8cm, find the position, power, nature, (Properties) height of the image and the magnification.

Answer 1

1/f = 1/v-1/u

1/8 = 1/v - 1/-12

1/8 + 1/12 = 1/v

3-2/24 = 1/v

v=24cm

m = v/u

m= 24/-12

m = -2cm

m= h2/h1

-2 = h2/7

h2 = -14cm

Answer 2

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