In bright daylight a reader's pupil contracts to a diameter of mm
PHYSICS · Multi-part · Fermi University Physics · Optics & Photonics · Interference and diffraction · Fourier optics and image formation
Optics and Photonics, Ch Fraunhofer diffraction from apertures and gratings
Problem
In bright daylight a reader's pupil contracts to a diameter of 2.0 mm. Take the wavelength of light as λ=500 nm.
((a)) Estimate the eye's angular resolution using the Rayleigh criterion.
((b)) Estimate the smallest print-stroke separation resolvable at the near point of 25 cm.
((c)) A caption in a diagram has stroke separations of about 0.08 mm. Is it legible at 25 cm in bright light, according to your estimate?