An object is placed in front of a convex lens of focal length . At what distance from the lens (in cm) is the image formed?
Answer and explanation
Correct answer: B. 30
- Step 1: Apply the thin lens formula with standard Cartesian sign conventions.
- Step 2: Assign given parameters: object distance and focal length for a converging convex lens : .
- Step 3: Rearrange and solve for image distance : .
Answer
30.
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