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Find the focal length of the lens shown ...

Find the focal length of the lens shown in Fig.

Text Solution

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Here
`R_(1)=-10 cm`
`R_(2)=10cm`
`mu=(3)/(2)`
`(1)/(f)=(n_(rel)-1)((1)/(R_(1))-(1)/(R_(2)))=((3)/(2)-1)((1)/(-10)-(1)/(10))`
`f=-10cm `
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