Unformatted text preview: = . Thus (assuming small angles, θ << 1), we get D 22 . 1 min ≈ This is only an approximation (the actual resolution is usually worse than this), but it allows us to make calculations. Example Problem: A hang glider is flying at an altitude of 120 m . Green light ( λ = 555 nm ) enters the pilot²s eye through a pupil that has a diameter D = 2.5 mm . If the average index of refraction of the material in the eye is n = 1.36 , determine how far apart two point objects on the ground must be if the pilot is to have any hope of distinguishing between them. Answer: 2.4 cm Object 1 Diffraction Patterns on Screen Round hole diameter D Object 2 Intensity θ min Rayleigh&s Criterion for resolution...
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 Spring '08
 FRY
 Physics, Power, Diffraction, Light, Wavelength, Department of Physics, R. D. Field, diffraction minimum

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