I know these are too late for the assignment, but here are two negative space pictures I took last week.
Camera: Nikon D60
Exposure: 0.002 sec (1/500)
Aperture: f/5.6
Focal Length: 175 mm
Focal Length: 174.5 mm
ISO Speed: 220
Exposure Bias: 0 EV
Flash: Off
Camera: Nikon D60
Exposure: 0.01 sec (1/100)
Aperture: f/5.0
Focal Length: 55 mm
Focal Length: 55.0 mm
ISO Speed: 200
Exposure Bias: 0 EV
Flash: Off