A wire mesh consisting of very small squares is viewed at a distance of `8cm` through a magnifying converging lens of focal length `10 cm`, kept close to the eye. The magnification produced by the lens is:

Options

A. 5
B. 8
C. 10
D. 20

Answer

A

Explanation

u = - 8, f = 10
`(1)/(v) = (1)/(10) - (1)/(8) = (4 - 5)/(40)`
v = - 40 cm
m = `(v)/(u) = (-40)/(-8) = 5. `