Two identical diverging lenses separated by 17 cm have a focal length of -8 cm each. An object is located 4 cm from the first lens on the left. The image distance from the first lens is -2.67 cm, and the final image distance relative to the second lens is -5.69 cm.

1. My Notes Ask Your Teach Two identical diverging lenses are separated by 17 cm. The focal
length of each lens is -8.0 cm. An object is located 4.0 cm to the Ie left of the lens that is on the
left. Determine the final image distance relative to th Additional Materials ASection 26.9
Solution
here,
the sepration , d = 17 cm
for the first lens
focal length , f1 = -8 cm
object distance , do1 = 4 cm
let the image distance be di1
1/f1 = 1/di1 + 1/do1
- 1/8 = 1/di1 + 1/4
solving for di1
di1 = - 2.67 cm
for the seccond lens
focal length , f2 = -8 cm
object distance , do2 = 19.67 cm
let the image distance be di2
1/f2 = 1/di2 + 1/do2

2. - 1/8 = 1/di2 + 1/19.67
solving for di2
di2 = - 5.69 cm