Our living environment is light up by the great sun. The direct sunlight light up half of the earth, and just a source of direct sunlight is not enough to light up every corner and every shade wihich behind the light source, so what helping sunlight to achieve that?
The answer is the reflected light. Don't look down on this reflected light, it shift the colour of the visible light of the day, a warm sunny morning, a cold gray raining day, a bright, clear and shape sunny afternoon, a gray and blur overcast hour, a warm yellow, orange and purple evening, that is just the basic of the colour shift every can see and feel.
This reflected light especially obvious when it capture by your camera, i belief you do realize why some of the picture you taken is very shape and clear but also have some, even you very sure it is in focus but still look blur and grayish..�
When a pure natural light source projected to the earth atmosphere, light diffused and project to the object on the earth surface. With our earth surface full of colorful object, like green leaf, red flower, blue sea, colored building and colored vehicle. The original natural light source has been mixed with the reflected light from a colored object, therefore when you shot people in a colorful garden at noon(especially), your portrait shot with contain the mixture of all the colour at that garden, especially the shadow, you might reliase there so many colour in the shadow, like green, red and even blue from the blue sky.
Therefore why most of the professional photographer like to choose shoting outdoor either is morning of evening. Well the direction of direct light at the morning and evening, has been reflected outward from the atmosphere, and the diffused reflected light become more expect able, its always the shadow contain the blue sky reflection.
As you can see, the scientific explanation from the above explain that, the light source carries the light source original hue, and the shadow carries the reflected diffuse light from it surrounding object.�
