1) Traveling down a long, straight Kansas road late at night, a driver notices a
ID: 1349446 • Letter: 1
Question
1) Traveling down a long, straight Kansas road late at night, a driver notices a lightapproaching in the distance. After a bit the driver notices that the single light has splitinto two distinct headlights. Estimate the maximum distance the approaching car can beassuming that 1) the driver’s pupils are 4 mm in diameter, 2) the approaching car’s headlightsare 5 ft apart, 3) the headlights emit primarily 580 nm wavelength light, and 4) that thedriver’s eyesight is diraction limited.
2) After passing the oncoming car, the driver looks at the dashboard to check thespeedometer. The driver notices that he can clearly read the numbers 0.8 m away if hepushes his head against the headrest, but they get blurry if he leans forward. What pre-scription eyeglasses (in Diopters) would this driver need to comfortably read a book 25 cmfrom his face? Assume the glasses would sit 2 cm in front of his eyes.
Explanation / Answer
1) Traveling down a long, straight Kansas road late at night, a driver notices a
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