Silhouettes are created when a bright light source is behind a person or object, which causes the detail of the person/object to be lost and only the outline is seen. This effect can be seen below in Gueorgui Pinkhassov’s photo of train guards at Kiev train Station.
Gueorgui Pinkhassov, Kiev train station, Moscow, RUSSIA, 1995.
Another way to capture natural light within photography is to photograph shadows. For some reason, I find the shadows that look the most interesting are the more un-natural abstract ones, such as the Gueorgui Pinkhassov and Garry Winogrand photos below.
Luc Delahaye, Kosevo Hospital, Sarajevo, 1993.
Ralph Gibson, The Somnambulist, 1970
Garry Winogrand, Hollywood Boulevard, 1969
This photo of Winogrand’s has always been one of my favourites because of the cross-over shadows of the three womens legs caused by two light sources (both are actually the sun, however it is reflecting off the window on the left to create two.)