This photograph was taken using a continuous lighting. Since the light is coming in from a low angle, the shadow that was casted was more dynamic. The light is coming in from the side as well, as indicated by the bright area on the egg. The bottom part of the egg is also a bit illuminated, but that is because the light is reflecting off the table. The main reason the white egg is visible on a white background is because of the contrast given by the lights and shadows.