Resolving Power: a Camera Used for Aerial Surveillance Has a Lens

question 9

Multiple Choice

Resolving power: A camera used for aerial surveillance has a lens with a 30-cm maximum aperture and a 42-cm focal length. Assume light of 550-nm wavelength is used and that the resolution of the camera is limited solely by diffraction. What is the angular resolution of the camera at maximum aperture?

• A) 1.6 µrad
• B) 2.2 µrad
• C) 3.2 µrad
• D) 4.5 µrad
• E) 6.3 µrad

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