In a biprism experiment, when a convex lens was placed between the biprism and eyepiece at a distance of `30cm` from the slit, the virtual images of the slits are found to be separated by `7mm`. If the distance between the slit and biprism is `10cm` and between the biprism and eyepiece is `80cm`, find the linear magnification of the image.

Explanation

From the magnification formula
`(d_(1))/(d)=(v)/(u)`
`(v)/(u)=(60)/(30)`
`(v)/(u)=2`
Linear magnification `=2`