Q14. A simple microscope has focal length 10 cm. Let M₁ be the magnifying power with the final image at D = 25 cm and M₂ with final image at infinity. M₁/M₂ equals:
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Q14. A simple microscope has focal length 10 cm. Let M₁ be the magnifying power with the final image at D = 25 cm and M₂ with final image at infinity. M₁/M₂ equals:

G1 Physics · Accepted Answer

GIVEN: Simple microscope f = 10 cm, D = 25 cm. Step 1: For a final image at the near point, M₁ = 1 + D/f = 1 + 25/10 = 1 + 2.5 = 3.5. Step 2: For a final image at infinity, M₂ = D/f = 25/10 = 2.5. Step 3: Ratio M₁/M₂ = 3.5/2.5 = 35/25 = 7/5 = 1.4. FINAL ANSWER: 7/5. Option C.