[pimlottc]

It's a bit absurd to have an article about this and not include any screenshots of the actual white blocks used by the lightgun to detect targets. This is a better explanation with visuals; it actually used two screens to do the detection:

https://www.scienceabc.com/innovation/how-did-the-nintendo-g...

[karmakaze]

So true. Here's one that also shows the other light gun games for NES[0].

[0] https://solidpawnadvance.wordpress.com/2016/12/31/light-gun-...