Final answer:
Colorado law mandates that headlights must be used from a half hour after sunset until a half hour before sunrise or less than 1,000 feet.
Step-by-step explanation:
As an example, when weather conditions such as fog, rain, or a snowstorm occur, they can severely limit visibility, necessitating the use of headlights to help drivers see the road and be seen by other drivers, even during the day. The human eye's capacity to resolve two points as separate, such as the headlights of a car.
Given that car headlights are typically 1.3 meters apart, and assuming the average pupil diameter is 0.40 cm, physics can be used to calculate the maximum distance at which car headlights can be resolved as separate lights.
For example, if a car has a 12-V battery rated at 100 Ah and the headlights are two 12-V, 40 W bulbs, it can be estimated how long the headlights would last before the battery is completely drained.