So my teacher was showing us this circuit he made in class today, and he wont tell us how it works. This is the picture of the circuit:
http://img517.imageshack.us/img517/7576/trickcircuit1tb.jpg
Its an AC circuit, one wire going through two switches, and then two light bulbs. He showed us, with both switches closed, both lights went on, as normal. Then he opened both switches, and neither light bulb lit up, as expected. Next he opened the right switch, and closed the left, the left light bulb went on, but not the right. How was this possible?? This also worked vise versa. He wont tell us what he put in the circuit to do this. Does anyone know how the circuit was able to do this, is it a trick? ( I thought it might have something to do with the light bulbs, since both were frosted and you couldnt see inside them, also he wouldnt let us touch the circuit after he demonstrated). He did say there was something that we couldnt see that was important. What was it?
http://img517.imageshack.us/img517/7576/trickcircuit1tb.jpg
Its an AC circuit, one wire going through two switches, and then two light bulbs. He showed us, with both switches closed, both lights went on, as normal. Then he opened both switches, and neither light bulb lit up, as expected. Next he opened the right switch, and closed the left, the left light bulb went on, but not the right. How was this possible?? This also worked vise versa. He wont tell us what he put in the circuit to do this. Does anyone know how the circuit was able to do this, is it a trick? ( I thought it might have something to do with the light bulbs, since both were frosted and you couldnt see inside them, also he wouldnt let us touch the circuit after he demonstrated). He did say there was something that we couldnt see that was important. What was it?