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Solution


Q.

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)      [2023]
1 increase the wave length of the light  
2 increase the refractive index of the medium between the object and objective lens  
3 decrease the focal length of the eye piece  
4 decrease the diameter of the objective lens  

Ans.

(2)

P=2μsinθ1.22 λ