What does the white arc on an airspeed indicator represent?

The white arc on an airspeed indicator is indeed representative of the stall speed in landing configuration and flap limits. This arc indicates the range of airspeeds that are appropriate when the aircraft is configured for landing and flaps are deployed. Specifically, the lower boundary of the white arc typically corresponds to the stall speed with flaps extended, and the upper boundary can represent the maximum speed with flaps extended.

Understanding the white arc is crucial for pilots, as it helps ensure that they maintain adequate airspeed to avoid stalling during critical phases of flight, especially during approach and landing. Knowing this range allows pilots to operate the aircraft safely and effectively within its designed limits while landing.