Question

If there is sun in the space why is light on the earth but not in space?

Answer 1

There is sun in the space and their is no light because in space there is no atmosphere. Our sky appears blue because of the atmospheric refraction and in space no refraction is possible as there is no atmosphere to scatter light.

Answer 2

There is light in space. Putting aside the wavelengths humans cannot see and focusing only on the visible spectrum, remember that we only see things because light bounces off and reaches our eyes. Certain things absorb certain wavelengths of light and reflect the rest, which is why certain things are certain colors.

If you’re asking why space appears mostly dark, it’s because space is mostly empty. There’s relatively little to emit or reflect light. Earth’s atmosphere distorts and almost “conducts” light; the sun lights up the entire sky during the daytime. Remember, though, that the sun appears to change colors during a sunset: even that relatively small difference in distance between noon and dusk is enough to distort enough light to appear a different color. With enough atmosphere, the sunlight would theoretically be blocked entirely.

However, there is no atmosphere in space, which means that while light can continue unimpeded for incredibly distances, it also isn’t being “conducted” into anything.