JEE MAIN - Physics (2023 - 29th January Evening Shift - No. 7)
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)
Decrease the focal length of the eye piece.
Increase the wave length of the light
Increase the refractive index of the medium between the object and objective lens
Decrease the diameter of the objective lens
Explanation
Resolving power of microscope $$ = \left( {{{2n\sin \theta } \over \lambda }} \right)$$
$$n\sin \theta $$ = Numerical aperture
$$n$$ is the refractive index of medium.
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