Final answer:
Uncertain/changing light levels while driving can impair visibility and pose a risk to the driver's safety.
Step-by-step explanation:
The uncertain/changing light levels while driving can affect the visibility of the road and objects around the driver. This can make it difficult for the driver to see clearly and react in real time to potential hazards on the road. For example, a sudden change from a well-lit area to a darker area can temporarily impair the driver's vision, causing them to miss important details on the road.
Another example is when the sunlight shines directly into the driver's eyes, it can create glare, making it challenging to see the road ahead. The glare can be particularly dangerous in certain situations, such as when approaching a curve or encountering oncoming traffic. To mitigate the effects of uncertain/changing light levels while driving, it is important to use headlights appropriately, keep windshields clean to reduce glare, and adjust driving speed and following distances to ensure sufficient reaction time.