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9. Ray optics abd optical instruments — Physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 SciencePhysics9. Ray optics abd optical instruments1 Mark
MCQ
In order to increase the magnifying power of a compound microscope
  • ✓
    The focal lengths of the objective and the eye piece should be small
  • B
    Objective should have small focal length and the eye piece large
  • C
    Both should have large focal lengths
  • D
    The objective should have large focal length and eye piece should have small
✓

Answer

Correct option: A.
The focal lengths of the objective and the eye piece should be small
a
( a)$|m|\; \propto \frac{1}{{{f_o}{f_e}}}$

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