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) 2.2 rad B) 1.6 rad C) 6.3 rad D) 3.2 rad E) 4.5 rad
Question 2
What buoyant force does a 0.60-kg solid gold crown experience when it is immersed in water? The density of gold is 19.3 103 kg/m3 and that of water is 1000 kg/m3.
A) 3.0 10-5 N
B) 3.0 10-4 N
C) 3.0 10-2 N
D) 0.30 N