The traffic light was made in 1823.
It did change the wrold alot because we didnt have traffic lights and there would be alot of accidents and when they invented the traffic light they could get around easier and it made it safer
red light is used in traffic lights because red light has a "longer wavelength" than other colours
the traffic light was invented because back in the day people didnt know what to do when driving and cars were new and to prevent people from crashing and accidents they invented the traffic light
light source
Gallium --- It Stops Traffic
The traffic light was made in 1823.
No, an eraser is made of rubber. Gallium is a metal.
No. A traffic light is a man made object, not part of the natural environment.
spoons. gallium spoons.
By reacting Gallium in an atmosphere of pure Nitrogen
The usual part of the traffic light is made of metal and the lenses are made of glass.
it was made in the US by a man who was British
traffic light
the second traffic light was made in America, the first one was made in Europe and exploded
he invented the traffic light because alot of people have car accidents and from peventing that, and from preventing traffic he did it to help the world
Gallium (: Group 13 Row 4