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because its main source that gives it to light is one of the main source of light
The moon is not a source of light because it simply reflects the suns light, therefore it is not a direct source of light
the sun is the primary source of light
The flame of a candle is a source of light.
It is the only source of light!
The photons spread over a larger area
As you move farther away your shadow get bigger and goes away
As light gets farther from the source, the same amount of light spreads out over a larger area.
The shadow will become less defined.
The cells farther away from the light source are longer than the cells facing the light.
Move the light source farther away from the object.
It goes back to that source
The intensity decreases.
Nothing. If the frequency of a wave depended on its distance from the source, then . . . -- The key of the marching band would change as it passed you in the parade. -- So would the colors on the flag.