In a biprism experiment, when a convex l...

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.

0.2 mm

0.25 mm

0.30 mm

0.45 mm

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