Light Activity: 3

 http://www.noupe.com/photography/50-high-quality-examples-of-silhouette-photography.html

The only light source for this photograph is the sunset. This allows the subjects to appear only as silhouettes. The photographer used a larger aperture because it was taken later in the day, with a darker light setting. 

   

http://www.noupe.com/photography/50-high-quality-examples-of-silhouette-photography.html

There is only one light source used in the photograph and because it is placed behind the subject, it causes him to appear dark and shadow like. The photographer used a larger aperature because there was a small light source.