The Earth's rotation doesn't directly give us light. Light comes from the Sun, a giant ball of hot gas that emits energy in the form of light and heat. Here's how it works:

* The Sun: The Sun is the source of light. It constantly generates light and heat through nuclear fusion.

* Earth's Orbit: The Earth orbits the Sun, traveling around it in an elliptical path. This orbit takes approximately 365 days to complete.

* Earth's Rotation: While orbiting the Sun, the Earth also spins on its axis. This rotation takes approximately 24 hours to complete and is what causes day and night.

* Day and Night: As the Earth rotates, different parts of the planet face the Sun. The side facing the Sun experiences daylight, while the side facing away experiences night.

In essence, the Earth's rotation causes us to experience alternating periods of day and night. It doesn't create light, but it allows us to receive the light from the Sun.