this is photo was done by having a very bright light behind the model this type of photo is know as a rim light.










this is a photo taken when a flash is liked to the camera and directed on to one side of the models face so that the shadow is on one side of the face.
if you move the light around the model the shadow on the face changes.









this photo is done by having tow strong lights on ether side of the model to leave the shadow down the middle of the face.