You use a lens of diameter DD and light of wavelength λ\lambda and frequency ff to form an image of two closely spaced and distant objects. Which of the following will increase the resolving power?


Answered 7 months ago
Answered 7 months ago
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The equation for the angular separation θ\theta is θsinθ=1.22λD\theta\approx\sin \theta=1.22\frac{\lambda}{D}. The narrower angular separation, better the resolving power.

If we increase the wavelength we will increase the angular separation, i.e. we will decrease the resolving power.

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