CBSE Class 10 Answered
An object is placed perpendicular to the principal axis of concave lens of focal length 30 cm. Find the position of an image when the object is at a distance 20 cm from the lens.
Asked by jullypradhan001 | 16 Jan, 2018, 08:16: AM
Expert Answer
u=-20cm ; f=-30cm ; v=?
1/v-1/u=1/f
1/v-1/-20=1/-30
1/v+1/20=1/-30
1/v=1/-30-1/20
1/v=20+30/-600
1/v=1/-12
v=-12cm
Answered by Abhijeet Mishra | 16 Jan, 2018, 09:37: AM
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