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An object is placed at 5cm from a convex...

An object is placed at 5cm from a convex lens of focal length 15cm. What is the position and nature of the image ?

Text Solution

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`"u = 5 cm, f = 15 cm"`
`(1)/(f)=(1)/(upsilon)+(1)/(u)`
`(1)/(upsilon)=(1)/(f)-(1)/(u)=(1)/(15)-(1)/(5)`
`(1)/(upsilon)=(5-15)/(15xx5) rArr (1)/(upsilon)=(-10)/(15xx5)`
`(1)/(upsilon)=-(1)/(7.5)`
`upsilon=-7.5cm`
Nature of the image is virtual.
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