The head lights of a jeep are 1.2 m apart. If the pupil of the eye of an observer has a diameter of 2 mm and light of wavelength 5896 A ˚ is used, what should be the maximum distance of the jeep from

Question

The head lights of a jeep are 1.2 m apart. If the pupil of the eye of an observer has a diameter of 2 mm and light of wavelength 5896 A ˚ is used, what should be the maximum distance of the jeep from the observer if the two head lights are just separated?

TestHub · Accepted Answer

Distance of jeep, x = 1.22 × λ D × d ​ D = diameter of lens, d = separation between sources. or x = 1.22 × 5896 × 1 0 − 10 ( 2 × 1 0 − 3 ) × 1.2 ​ m or x = 3336 m or x = 3.33 km .

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