A scientist is observing a bacteria through a compound microscope. For better analysis and to improve its resolving power he should: (Select the best option)
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A scientist is observing a bacteria through a compound microscope. For better analysis and to improve its resolving power he should: (Select the best option)

G1 Physics · Accepted Answer

Resolving power of a microscope is proportional to numerical aperture divided by wavelength. Since numerical aperture = n sinθ, increasing the refractive index n of the medium between object and objective improves resolving power.