The light-emitting semiconductor material determines the LED's color, so the number of colors is infinite. As indicated by its full name â Light Emitting Diode â an LED is a diode that emits light. A diode is a device that allows current to flow in only one direction. Almost any two conductive materials will form a diode when placed in contact with each other â with a single p-n semiconductor junction between them.
For other uses, see Texas Longhorn (disambiguation) and Longhorn (disambiguation). The Texas Longhorn is a breed of cattle known for its characteristic horns, which can extend to over 1.8 m (5.9 ft) tip to tip for bulls, and 2.1 m (6.9 ft) tip to tip for steers and exceptional cows.
The invention of barbed wire in 1884 closed the open range, bringing a halt the legendary cattle drives (Gard, 60). As railroads became more developed and widespread, they eventually became the transportation of choice for the shipment of cattle from South Texas.he foundation for the ranching industry in Texas sprang from the large number of cattle that existed in northern Mexico, roaming the open range. The first cattle were brought to the new world by Gregorio de Billalobos along the Panuco River in 1521 six months before Cortez captured Mexico City.