What changes in solar energy that create day and night are results of?

The changes in solar energy that create day and night are primarily the result of the Earth's rotation on its axis. As the Earth spins, different parts of its surface move into and out of direct sunlight, leading to the cycle of day and night. This rotation takes approximately 24 hours to complete, causing areas to experience varying levels of solar energy throughout the day. Consequently, when one hemisphere is exposed to sunlight, the opposite hemisphere is in darkness.