If I put a bright spotlight directly in your eyes, you may not be able to identify a basketball as I move it towards and in front of the spotlight, because of the intensity of the light. The basketball may only appear as a shadow. but I can still take that basketball and bounce it, or pull it over far enough to the side that you see the orange and recognize what it is. But with intense light behind it and it in proximity, it may only appear as a dark spot that's blocking the light from your field of vision.