Dit vond ik zo snel op het web; ik weet niet of het betrouwbaar is.
Citaat:
Adam Caporello: If you watch the screen when you fire the gun, you'll notice that it changes. For the split second you "fire" the gun, the screen turns black... but the ducks turn into big white squares. The light gun doesn't actually detect what part of the screen it's pointed at... it's simply a focused light sensor. It sees whether it's focused on black or white. All the game needs to process after that is "black means miss", and "white means hit".