Two convex lens has a focal length ‘f1’ and ‘f2’ are separated co-axially by a distance ‘d’. The power of combination is zero then the magnitude of distance ‘d’ will be how much ?
Two convex lens has a focal length ‘f1’ and ‘f2’ are separated co-axially by a distance ‘d’. The power of combination is zero then the magnitude of distance ‘d’ will be how much ?
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