At night, the pupil of a human eye can be considered to be a slit by a diameter of 8.0 mm. The diameter would be smaller in daylight. An automobile’s headlights are separated by 1.8 m. How far away can the human eye distinguish the two headlights at night?
Hint: suppose a wavelength of 500 nm and recall that Rayleigh’s criterion stated that the peak of one image must be at the first minimum of the other.