An object is placed at a distance of 20cm from a convex lens of focal length 10cm find the image distance of the image
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Explanation:
Given:u=−10cm f=20cm (convex lens)
To find: v and image's nature.
Solution: From lens formula
v1−u1=f1
v1+101=201
v1=20−1
v=−20cm
And magnification = uv=2
Hence image formed is virtual, erect and magnified two times.
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