Final answer:
Dark-colored clothing can keep you cooler when exercising on hot, sunny days because it absorbs more radiation from the sun compared to light-colored clothing. This prevents the heat from reaching your skin, keeping you cooler. Light-colored clothing reflects more radiation, helping to maintain a lower body temperature during exercise in hot conditions.
Step-by-step explanation:
Dark-colored clothing can keep you cooler when you exercise on hot, sunny days. This is because dark colors, such as black, absorb more radiation from the sun compared to light colors, such as white. When the dark clothing absorbs the radiation, it prevents it from reaching your skin, keeping you cooler. On the other hand, light-colored clothing reflects more radiation, allowing less heat to be absorbed, which can help maintain a lower body temperature during exercise in hot conditions.