On the light spectrum there is a small section of light that is visible to the human eye.
This section contains the colours known as Roy G. Biv or Red, Orange, Yellow, Green, Blue, Indigo and Violet.
The way we see colours is through reflected light
White reflects colours back
What we see is the light bouncing around off objects
There are two types of light
Hard Light
Soft Light
Inverse Square Law <-2000w at 1 meter 2000w at 2 meter 500w at 4 meter 125w
Double the distance quarter the watt
Positioning of lights
Different light positions are required under different circumstances such as skin tone, shape of face and even glasses
This image shows an example of a studio lighting set up, showing the position of the camera, hard lights, back light and reflectors
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