Definition : A silhouette is a view of a object or scene consisting of the outline and a featureless interior, with the silhouetted object usually being black.
how to produce image above using your DSLR?
1-Shoot entirely in RAW
2-Make sure your subject is facing the light source
3-Set the ISO to 400 (sufficient!)
4-Aperture set to F10 and above (the higher the darker) the image above used F13
5-Shutter speed (1/60 seem ok, experiment it a bit aight!)
6-Press the shutter and voila!
7-Open up The Photoshop!
8-Tweak the picture using Level
9-save and display it.