A compound microscope has a magnification of 30. The focal length of the eyepiece is 5 cm. If the final image is formed at the least distance of vision (25 cm), the magnification produced by the objective is
Options

Question

A compound microscope has a magnification of 30. The focal length of the eyepiece is 5 cm. If the final image is formed at the least distance of vision (25 cm), the magnification produced by the objective is

Options

G1 Physics · Accepted Answer

Derived solution: Step 1: For a compound microscope use the objective and eyepiece magnifications, with M ≈ (L/fₒ)(D/fₑ) in normal adjustment (or the corresponding near-point form). Step 2: Substitute the values given in the question and apply the geometry/sign convention shown. Step 3: On simplification the result is 5. Therefore the correct option is A.