zachtheterrible
Active Member
These are a couple of questions that I have been wondering at for quite some time. I figure I might as well ask 'em all in one thread instead of starting a couple :lol:
1. Why does the human body produce a 50/60HZ hum?
2. What are those little things that you see on top of stoplights? They are probably about 3 inches tall and an inch wide, in a cylindrical shape. They are black. They have two little pieces of metal sticking out, pointing towards the road that the stoplight that they are on is controlling; it looks like they shade some kind of sensor from the sun. My best guess is that they are IR sensors that turn the light green when an ambulance, fire truck or police car points a control at them if they are in a rush.
A friend of mine told me that at night you can flash your headlights at them twice and it will turn the light green. Sounds like a load of crap to me :lol: . I have yet to try it.
I know I have more. Ill write them down as they come :lol:
1. Why does the human body produce a 50/60HZ hum?
2. What are those little things that you see on top of stoplights? They are probably about 3 inches tall and an inch wide, in a cylindrical shape. They are black. They have two little pieces of metal sticking out, pointing towards the road that the stoplight that they are on is controlling; it looks like they shade some kind of sensor from the sun. My best guess is that they are IR sensors that turn the light green when an ambulance, fire truck or police car points a control at them if they are in a rush.
A friend of mine told me that at night you can flash your headlights at them twice and it will turn the light green. Sounds like a load of crap to me :lol: . I have yet to try it.
I know I have more. Ill write them down as they come :lol: