Magnifying power of a simple microscope can be increased by ?
Correct answer: B. Decreasing focal length of the lens
- A. increasing focal length of the lens
- B. Decreasing focal length of the lens
- C. Lens of large aperture
- D. lens of short aperture
- E. None of these
Explanation
For a simple microscope, magnifying power increases as the focal length decreases, since its angular magnification is approximately proportional to 1/f. Aperture mainly affects brightness and resolving ability, not the basic magnification here.
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