Want this question answered?
it was invented so paper can save space and it is also very light in weight.It is very easy to make.It was invented because the level of comerce and it got to the point where metal coins/Metals were very long.
Provided the paper is kept just below the flash point, it will not burst into flames. It will become charred and powdery. The metal rod? I assume a metal tube? keeps the paper away from direct heat or a naked flame.
john cena
Conduct electricity, of course. They connect signals from point to point in the circuit like in all electronics.
The lens of the magnifying glass concentrates the sun's light to a point. At that point the paper is heated to its ignition temperature and it can catch fire
Tungsten, a metal with a very high melting-point.
tungsten
There is no such thing as "metal point".
Conductor
It is made of tungsten, a metal with a very high melting point.
The one with a higher melting point will generate more light (Tungsten is a metal that's often used.) see related link . Another opinion: It won't necessarily generate more light, but it'll surely last longer before you need a new one.
Heat and light. The metal filament heats up to the point of incandescence in the visible part of the spectrum.