A double double split experiment?

[QuantumHop]

If you set a detector to monitor the first slit in your experiment you observe particles.

What happens if you set a second slit with no detector for the particles to go through, will you observe waves or particles in the second slit experiment?

 

[Whovian]

So one slit with a detector and one without? Interesting; my guess (though just a guess) would be a diffraction pattern out of the one without the detector and a "particle-like" pattern from the one with? Or maybe both result in particles, because with subtraction one could determine how many are going through the second slit? I'm no expert; I'm a bit rusty on QM, so don't take this post with too much regard.