A person is observing a bacteria through a compound microscope. For better observation and to improve its…
A person is observing a bacteria through a compound microscope. For better observation and to improve its resolving power he should
increase the wavelength of light.
increase the refractive index of the medium between the object and objective léns.
decrease the focal length of the eyepiece.
decrease the diameter of the objective lens.
Solution
Resolving Power $\mathrm{R}=\frac{\text { N.A }}{0.61 \lambda}$
$\text { N.A }=2 \mathrm{n} \sin \alpha$
$\therefore \quad$ By increasing the refractive index of the medium between the subject and the objective lens, the resolving power can be increased.
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