Two lenses, the first with focal length -12.5 cm and the second with focal lengt

Question

Two lenses, the first with focal length -12.5 cm and the second with focal length 20.0 cm, are separated by 15.0 cm. If an object is place 50.0 cm in front of the first lens...

a. Where is the final image formed? (10 cm before first lens, 25cm before the second lens, 25cm after the second lens, 50cm after the second lens, 100cm after the second lens)

b. What is the total magnification? (20, -20, 1.25, -1.25, -0.800)

c. Where is the final image? (20cm after second lens, 12.5cm after second lens, 5.6cm after send lens, 50cm after second lens, 100 cm after second lens)

d. What is the size of the final image? (2.40cm, 4.80cm, 12.4cm, 24.0cm, 0.96cm)

Explanation / Answer

a) and c) 100cm after the second lens

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