Question

An object is placed at a distance of 15 cm from a convex lens of focal length 20 cm . List four characteristics ( nature, position, etc) of the image formed by the lens .

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Answer 1

solution:

object  distance u= -15cm

f=20cm

using lens formula,1/f=1/v-1/u

1/v=1/10-1/20

1/v=1/20

therefore v=20cm

the image gets formed 20cm to the right of the lens and it will be inverted

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