A Lens with a Positive Focal Length F₂ = +40

question 53

Multiple Choice

A lens with a positive focal length f₂ = +40 cm is placed 20 cm behind a lens with a negative focal length f₁ = -80 cm. An object is placed 240 cm in front of the lens f₁. The final image distance relative to lens f₂ is

• A) -40 cm.
• B) 56 cm.
• C) -56 cm.
• D) 80 cm.
• E) -80 cm.

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