Daylight
Nothing covers the sun at night. It becomes dark because of the rotation of the earth and that part of the globe that is not facing the sun experiences night time. The part that is facing the sun experiences day light.
...experiences daylight, while the side facing away from the sun experiences darkness. This is due to the rotation of the Earth on its axis, which causes day and night cycles.
The side facing the sun experiences daytime, while the side facing away experiences nighttime. This is due to the earth's rotation on its axis, which causes different parts of the planet to be illuminated by the sun at different times.
The rotation of earth on its axis
When Earth is facing the Sun, it is experiencing daytime, characterized by sunlight and warmer temperatures. This exposure to solar radiation causes various phenomena, including photosynthesis in plants and the heating of the Earth's surface. The side of Earth that is not facing the Sun experiences nighttime, where temperatures generally drop and darkness prevails.
The Earth rotates once on its axis every 24hrs. The half of the Earth facing the Sun experiences daylight while the held of the Earth facing away from the Sun is in darkness, aka night. As the Earth is constantly rotating the portions of the Earth that are experiencing daybreak and nightfall are constantly changing.
Because the Earth is a spinning ball and one side faces the sun and the other side is in its own shadow facing away form the sun. Therefore as the Earth spins a point on its surface spends some time facing the sun in the daylight and some time in the shadow area when there is no daylight.
what is the period when a given part of earth is facing the sun
It is night in the hemisphere facing away from the Sun.
No, it is not nighttime when the Earth faces the Sun; it is daytime in those areas. The Earth rotates on its axis, and as it turns, different parts of the planet experience sunlight or darkness. When a location is facing the Sun, it experiences daylight, while the opposite side of the Earth is in nighttime.
It is dark in one country and light in another due to the rotation of the Earth. The side of the Earth facing away from the Sun experiences night, while the side facing the Sun experiences daylight. This rotation creates the cycle of day and night around the globe.
Day and night are caused by the rotation of the Earth on its axis. During the day, the side of the Earth facing the Sun experiences daylight, while the opposite side experiences night. As the Earth rotates, different parts of the planet are exposed to the Sun's light, creating the cycle of day and night.