1.
17 of 20 You place an object in front of a mirror and observe that the image is real. Which of the
following arrangements could produce this image? A diverging lens, but only if the object is
placed at do f A converging lens, but only if the object is placed at dof A converging lens, but
only if the object is placed at do>
Solution
17) D) A converging lens, but only of theobject is placed at do > f
14) A) 12 cm
magnfication, m = 4/2 = 2
let u and v are object and image distance.
we know, m = -v/u
v = -2*u
= -2*6
= -12 cm
now use,
1/f = 1/u + 1/v
1/f = 1/6 + 1/(-12)
f = 12 cm
15) B) -2.0 cm
use,
1/u + 1/v = 1/f

2.
1/v = 1/f - 1/u
1/v = 1/2 - 1/1
v = -2.0 cm
12) B) smaller than the incident angle
7) A) The radius of curvature of the mirror