An Object Placed 4 Cm to the Left of a Lens

question 101

Multiple Choice

An object placed 4 cm to the left of a lens with positive focal length f₁ = +2 cm produces an image 4 cm to the right of the lens. A diverging lens, focal length f₂, is now placed at the focal point of the first lens, as shown, and produces a final image 6 cm to the right of lens f₂. The focal length f₂ is

• A) -1.5 cm.
• B) -3.0 cm.
• C) -6.0 cm.
• D) 10 cm.
• E) -2.0 cm.

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