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A bioconvex lens whose both the surface ...

A bioconvex lens whose both the surface have small radii of curvature has a power of`5D`.The refractive index of material of lens is `1.5`.The radii of curvature of each surface is:-
`(1)20cm ,(2)15cm, (3) 10cm ,(4) 5cm`

Text Solution

Verified by Experts

`P=(1)/(f):.f=(1)/(P)=(1)/(5)m=20cm`
For an equiconvex lens
`(1)/(f)=(2(mu-1))/(R )`
`R=2(mu-1)f`
`=2xx0.5xx20=20cm`
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