In a camera, four similar thin convex lenses are axially in contact. According to the question’s idealized lens-combination model, compare their combined power and total magnification with power p and magnification m of each lens.
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Question

In a camera, four similar thin convex lenses are axially in contact. According to the question’s idealized lens-combination model, compare their combined power and total magnification with power p and magnification m of each lens.

Options

G1 Physics · Accepted Answer

Step 1: For thin lenses in contact, their optical powers add: P(equivalent) = P₁ + P₂ + P₃ + P₄. Step 2: Each has power p, so P(equivalent) = 4p. Step 3: The source applies the product rule for successive magnifications: M(total) = m × m × m × m = m⁴. Final answer: 4p and m⁴, Option C. Note: For lenses strictly in contact, assigning the same independent magnification m to each element can be physically ambiguous without the object and image conjugates; this is the model assumed by the printed p…