Question

Section 26.9 Lenses in Combination 65. G Two identical diverging lenses are separated by 16 cm. The focal length of each lens is -8.0 cm. An object is located 4.0 cm to the left of the lens that is on the left. Determine the final image distance relative to the lens on the right.

Answer 1

Diverging lenses f=-8 cm amo 0,=4 cm, -L316 - cm

so, with multiple lenses, we find the image of the finest lens & make that the object for the second lens & then you can find the final image. so, first find the image of the image of the left lens. t = $ ó o com a com :. és -fcm

& the object distance for the second lens is found from. 02 - L-es = 16 cm - ( cm) - 48 cm + 8 cm 3 oo O2 = 56 cm 3 3 now find the second image using this object distance. E-com so em = -7-3 56 cm 56 cm

og ég = - 56 cm To ... ez = -5.6 cm - the minus Sign means the image is 5.6. cm to the left of the lens on the right.