Nintendo Zapper Guns
Date: Around 1999
How does the zapper gun used for Nintendo work? It is
mindboggling. When you shoot the gun at the TV screen, it somehow senses
the ray or something from the gun and knows when to kill the ducks. Can
you explain this to me?
The gun is looking at the TV. If it sees a duck (or, more likely, just
a bright spot) at the time you press the trigger, the duck dies.
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Update: June 2012