9.The two headlights of a car are 1.4m apart. At what maximum distance will the eyes resolve them? Assume that the pupil diameter is 5.0mm, and use a wavelength of 550 nm for the light. (Consider only diffraction effects.)
(A)3km
(B)5km
(C)10km
(D)15km
(E)20km Fig 1

答案：登入後查看
統計： A(1), B(2), C(14), D(2), E(1) #2308244

詳解 (共 1 筆)

#4337130

 圓孔解析度要*1.22 => Θ = 1.22λ/d=> L/D = 1.22*550*10-9/0.005 = 1.4/D
=> D = 1.4*0.005/1.22*550*10-9~= 1.04*104 m ~= 10km(C)

1
0