1.

Shown an object and its image formed by a thin lens. Then the nature and focal length of lens is A. `f=4.8cm,` converging lensB. `f=4.8 cm,` diverging lensC. `f=2.18 cm,` converging lensD. `f=-2.18 cm,` diverging lens

Answer» Correct Answer - B
`(1)/(v)-(1)/(u)=(1)/(f)impliesv=-3cm,`
`u=-8cm. impliesf=(-24)/(5)=-4.8cm`


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