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The biggest source of light on earth is our Sun. The Sun is, basically, a long-burning nuclear fusion fire. Like fires familiar to we earthlings, it puts out heat and light ... in fact, it is the most significant source of heat and light ... the only other sources of light are terrestrial sources (artificial lights on earth and volcanoes). Light from the Moon is actually reflected sunlight, so if we don't count sunlight we also cannot count moonlight; likewise, the Northern Lights and Southern Lights are effects from the sun hitting our atmosphere and magnetic fields so would not count, either; the only other light sources would be distance stars ... essentially, without the sun, we would only have what light we have when there is a New Moon.
If you had a ball and a flashlight in an otherwise dark room, and the ball and flashlight were on a table (so you wouldn't have to hold the flashlight) and the flashlight was turned on and pointed toward the ball, only half of the ball would be lit by the flashlight (not counting light reflected off the walls or other surfaces behind the flashlight which would at least somewhat light the backside of the ball). Its a very good analogy to your question: if you walked around the table to observe the side of the ball opposite the flashlight, it would be in shadow, and that is what nighttime is: it's the part of the earth that is in shadow from our Sun.
The earth spins around its axis (in my ball/flashlight analogy, consider spinning the ball); thus, all of the earth at some point or another actually gets lit by the sun, but only half of the Earth at any particular point in time (not counting light from the sun reflected from the moon back to Earth, which we call moonlight).
The Sun does not surround the earth, it is just one object -- it is much bigger than the earth, but very far away; just like you can block a giant mountain that is far away from your eyesight with a thumb, so too does the earth (a tiny speck compared with the giant Sun) shade half of itself from the sun's light.
What else can I help you with?
Is it night time in ALL parts of the world in th SAME time?
No. Day and night is determined by what part of Earth is facing the sun. Half of the Earth faces toward the sun and half of earth faces away from the sun. As the Earth spins on it's axis, we get daylight in one side of the earth, and night time in the other side of the earth. It is never possible to have night time, or day time, on all the earth at the exact same time.
Why the whole of the Earth does not experience daylight at the same time?
The earth rotates on an axis, which means it's in a different spot everyday, this is why we have day light savings time.
What reaches the earth first x-ray radiation or visible light?
From the same event on the same source both should arrive at the same time, unless delayed by an intervening medium.
What part of earth has night at the same time?
Half the Earth is light, the other half is dark. Anywhere on the dark half experiences night.
When does no direct sun light hit earth?
Direct sunlight does not hit all parts of the Earth at the same time. It does not hit areas experiencing nighttime due to the rotation of the Earth on its axis. Additionally, during sunset and sunrise, sunlight is less direct and more spread out.
Why do all parts of earth not have light at the same time?
Because of the tilt
How does the sun give light to different parts of the Earth at the same time?
The sun is 92 million to 94 million miles away depending on the time of year, which is far enough away that it can illuminate the entire half of Earth facing it, just as shining a light on a ball lights up half of it.
Why do earth have different time?
Because the planet moves around the sun, therefore the sun can not light the entire planet at the same time, and so the different parts of the planet have different times of day and night.
Why would gamma rays and light waves reach the earth at the same time?
Gamma rays and light waves can reach Earth at the same time if they are emitted simultaneously from the same event, such as a supernova explosion. Since both travel at the speed of light in a vacuum, they can arrive on Earth together, despite having different properties and wavelengths.
What happened when the earth will rotate on its axis once a year?
In that case, it would show the Sun the same face all the time. In parts of the Earth it would be day all the time, in other parts it would be night all the time.
Can the whole globe be lighted at the same time?
No, as only one side of Earth can be facing the Sun, which is our main source of light. Moonlight isn't strong enough to light up the Earth to the same extent.
Is it night time in ALL parts of the world in th SAME time?
No. Day and night is determined by what part of Earth is facing the sun. Half of the Earth faces toward the sun and half of earth faces away from the sun. As the Earth spins on it's axis, we get daylight in one side of the earth, and night time in the other side of the earth. It is never possible to have night time, or day time, on all the earth at the exact same time.
Can the whole Earth be lighted at the same time?
No, the whole Earth cannot be lit at the same time due to the natural rotation of the planet. This rotation causes different parts of the Earth to be in darkness while others are in daylight.
Do all parts of the earth see the same stars at the same time?
No, different parts of the Earth see different stars at the same time due to the Earth's rotation. As the Earth rotates, it changes the view of the night sky depending on the observer's location. The stars visible from a particular location depend on factors such as latitude and time of year.
Why the whole of the Earth does not experience daylight at the same time?
The earth rotates on an axis, which means it's in a different spot everyday, this is why we have day light savings time.
Is it night time in all parts of the world in the same time?
No. Day and night is determined by what part of Earth is facing the sun. Half of the Earth faces toward the sun and half of earth faces away from the sun. As the Earth spins on it's axis, we get daylight in one side of the earth, and night time in the other side of the earth. It is never possible to have night time, or day time, on all the earth at the exact same time.
What reaches the earth first x-ray radiation or visible light?
From the same event on the same source both should arrive at the same time, unless delayed by an intervening medium.
