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.
At that time Mexico included what was to become Texas. The longhorn cattle were kept on an open range, looked after by cowboys called vaqueros. In 1836, Texas became independent, the Mexicans left, leaving their cattle behind. Texan farmers claimed the cattle and set up their own ranches.Beef was not popular so the animals were used for their skins and tallow.e promised a good price for cattle sold in Abilene and was a man of his word. One cattleman bought 600 cows for $5,400 and sold them in Abilene for $16,800. It was the beginning of the ' beef bonanza '. Between 1867 and 1881 McCoy sent more than 2 million cattle from Abilene to Chicago.