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Question

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

Solution

VerifiedAnswered 7 months ago

Answered 7 months ago

Step 1

1 of 2The equation for the angular separation $\theta$ is $\theta\approx\sin \theta=1.22\frac{\lambda}{D}$. 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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