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An individual's eye pupil changes from a diameter of 3.5 mm to 1.4 mm as the illumination is increased.By what factor does the minimum angle of resolution change?


A) 0.5
B) 0.71
C) 2.2
D) 2.5
E) ​4.9

F) A) and B)
G) All of the above

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Which eye defect is corrected by a lens having different curvatures in two perpendicular directions?


A) myopia
B) presbyopia
C) hyperopia
D) astigmatism

E) None of the above
F) All of the above

Correct Answer

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Tripling the aperture diameter of a camera lens will change the light intensity admitted to the film by what factor?


A) 0.11
B) 0.33
C) 3.0
D) 9.0
E) ​12.0

F) C) and E)
G) C) and D)

Correct Answer

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