A compound microscope has a magnification of 30. The focal length of its eyepiece is 5 cm. Assuming the final image to be formed at least distance of distinct vision, calculate the magnification produced by objective .

Explanation

Data supplied , , = - 30. = 5 cm D = 25 cm, ` " " m = m_(0) xx m_(e), " " m_(e) = (1 + (D)/(f_(e)))`
`therefore m = m (1 + (D)/(f_(e)))`
`- 30 = m_(0) ( 1 + (25)/(5) ) = m_(o) xx 6 `