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Questions  

A microscope has its numerical aperture of 0.16. If wavelength of light used is 5500Ao, The resolving power of the microscope is 

a
4.6 x 10-5
b
2.9 x 10-5
c
3.2 x 10-5
d
5.8 x 10-5

detailed solution

Correct option is D

(4)N.A.=μsinθ=0.16λ=5500 Ao=55 ×  10−8 m∴   Resolving  power=2μsinθλ=2N.Aλ=2 × 0.1655 × 10−8 m−1=5.8  ×  105  m−1

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