Lighting

Back Light- is used to provide seperation from your subject and the background.
Key Light- primary source of light. It provides a base light for your subject.
Fill Light- provides some fill in to the shadow are of your suject to balence out the contrast created by the key light.

High key lighting- light sources from all directions, bright, clear subject
Low key lighting- Fewer light sources, less area lit up, creates shadows
Ambient lighting- Gentle, lights part of the set, calm and warming.
Hard light- Light source directly on subject, strong, bold images also shadows, good for shooting villains.
Filters- Filters fitted to the lens (or edited in editing process) alteration to colour.
Just back light- Silhouette or aura