So, when you point it at something blue it will see blue, and likewise for other colors. When you re playing duck hunt and you pull the trigger, the screen will momentarily flash black and the ducks will turn different colors. The gun tells the Nintendo what color it sees, and knowing that, the Nintendo knows what you shot. And that is how the zapper works. Leaky jars are a reference to Plato s Gorgias, around line 493e.
Leaky jars are very bad things.
Correction, leaky jars are evil. My buban has leaky jars. But don t we all. According to some, god had leaky jars, and hence it flooded. His jars were bigger than mine, so when they leaked, more water came out.