Question

mention the factor on which scattering of light depends.why does the sky appear dark in space

Answer 1

For scattering of light there should be some particles present in air.
Sky appears dark in sky because there is no scattering of light

Answer 2

The factors on which scattering of light depends are:-

i) Wavelength of the light

ii) Size of the particles

etc.

Due to absence of scattering of light in space, the sky appear dark in space.