3 ms·
I'm guessing you haven't taken the subway in NYC. A lot of times the stairs are only on one side. And the tracks are extremely long and have many trash cans and
by goldenkey 8y ago
I'm guessing you haven't taken the subway in NYC. A lot of times the stairs are only on one side. And the tracks are extremely long and have many trash cans and objects occluding a clear view.
- jstanley 8y agoI have read the wikipefia article a few times, but maybe I don't understand what a dip circle does. My understanding is that it tells you how parallel you are to the magnetic field lines. I don't see how that helps you find the stairs. All I can see is that if you lay it down on some steps, it will tell you whether it's pointing uphill or downhill. Is that not correct? Do the magnetic field lines in a tube station somehow point towards the exit rather than the north pole?
- goldenkey 8y agoWell.. steel or any metal in the ground will distort the field. I don't know if it would point to the stairs but it would definitely show you the least occluded path.