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The Sun appears larger at dusk or dawn than it does at noon. This is due to the fact
that when the sun is near the horizon, the rays of light it emits must pass through
layers of air of increasing density. The sun appears to be larger due to the
continuous bending of light. The sun appears smaller at noon than it does at dusk
or dawn. This is due to the fact that light rays that normally fall on the earth's
surface are not refracted.
Scattering of Light
Scattering is a general physical process in which certain types of radiation, such as
light or moving particles, are forced to deviate from a straight trajectory due to one
or more localized non-uniformities in the medium through which they pass.
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