Final answer:
The order of lights on a traffic light goes from top to bottom, with red on top, followed by yellow and green.
Step-by-step explanation:
Physics: Traffic Light Order
The order of lights on a traffic light goes from top to bottom. The top light is usually red, followed by yellow in the middle, and then green at the bottom.
For example, when the green light is on, it indicates that it is safe to proceed. When the yellow light is on, it signals drivers to prepare to stop. Finally, when the red light is on, it means that drivers should stop and wait for it to turn green.