In order to pass this test, you need to be able to tell the examiner which switch controls which light. There are three lights and three switches.
The catch is that you cannot see the lights from where the switches are located. You can walk over there after setting the switches, but when you do, you cannot go back to the switches. You only get one shot at this.
So... what method do you use that will give you 100% reliability on which switch controls which light?
Just in case you care, 110v AC, regular on/off switches, incandescent 60watt bulbs, no timers, no remote controls, you cannot rewire anything, no knocking down walls or cutting holes in them, and there is a plush red easy chair next to the lights. PS: None of this makes any real difference, the answer, when you figure it out, is obvious despite all of this.
The catch is that you cannot see the lights from where the switches are located. You can walk over there after setting the switches, but when you do, you cannot go back to the switches. You only get one shot at this.
So... what method do you use that will give you 100% reliability on which switch controls which light?
Just in case you care, 110v AC, regular on/off switches, incandescent 60watt bulbs, no timers, no remote controls, you cannot rewire anything, no knocking down walls or cutting holes in them, and there is a plush red easy chair next to the lights. PS: None of this makes any real difference, the answer, when you figure it out, is obvious despite all of this.