tanstaafl
Spawn of Cthulhu
Registered: Oct 2002
Location: Atlanta, GA
Posts: 735 |
Actually, there is a way to do it and what they showed was fairly accurate. It's just hard to pull off in reality. Someone not too long ago built a gadget pretty much like the one used in the episode.
As Grissom said at some point, it's all about physics. Once the wheel is spun and the ball released, the only forces acting are gravity and friction. Calculate those well enough and you can come up with a pretty good idea of where the ball will land.
First, you have to calibrate the system. After the ball is released, the first guy notes when it passes a particular spot and taps an entry. When it passes that spot a second time he taps it again and then again when it passes for the third time. This lets the computer determine how fast the ball is travelling and how fast it is slowing down.
The guy doing the calibration then does the same thing to the wheel, noting when a particular number on the wheel passes the same spot and doing the same twice more. Now the computer knows how fast the wheel is spinning and how fast it is slowing down. Since the same spot was used in both cases, it also knows where the ball is relative to the wheel.
Finally, when the ball lands, you note the slot it landed in.
You do this a few dozen times and the system is calibrated. You can't tell exactly where the ball is going to land since it's going to bounce around a bit when it hits the pins on the wheel, but you can narrow it down enough to easily tip the odds in your favor.
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Things I Will Do if I am Ever the Hero
#86 When the Evil Overlord tries to guilt-trip me by claiming that I'll be responsible for something he plans to do if I don't cooperate with him, I'll mercilessly quote Ayn Rand to him.
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