As an absolute layperson in electronics I just found out that an LED only lights up when connected like in figure 1 but not when connected like in figure 2. And I just don't get why?
I know an LED is a diode and current can only move through it in one direction, but that's the case in both constructions. I don't see a difference in both constructions.
So why does it obviously make a difference?
figure 1 (battery not depicted): figure 2 (battery not depicted):