What is the designation for the rank that features a silver bar?

The rank that features a silver bar is that of a 1st Lieutenant. In the United States Air Force, the rank structure is symbolized by distinctive insignias, and for the 1st Lieutenant, this insignia consists of a single silver bar. This rank represents a progression from 2nd Lieutenant, which is indicated by a gold bar. Therefore, the silver bar not only signifies a higher rank but also reflects the officer's experience and time in service. In contrast, the other ranks listed have different insignias; for instance, a Captain holds two silver bars, a Major is characterized by a gold oak leaf, and a 2nd Lieutenant is recognized by a single gold bar. Understanding these insignias is essential in grasping the rank hierarchy within the Air Force.