If the heading of the aircraft is adjusted to the heading marker, what will happen according to illustration 2?

When the heading of the aircraft is adjusted to the heading marker, the indication suggests that the aircraft is moving toward the radial indicated by the navigational aid, but the actual trajectory of the aircraft may not align with this radial effectively.

In the context of navigation, particularly when utilizing navigational aids like VORs, intercepting a radial depends on the position of the aircraft relative to the station and the selected radial. If a pilot is on a heading that does not align with any of the radials available or is at a position where it cannot physically join the radial, adjusting the heading to reflect the heading marker will not lead to an interception of that radial.

This means that, despite aligning the heading of the aircraft with the marker, external factors such as position and flight path will determine whether an interception occurs. If the aircraft's position is such that it is not able to join the selected radial at any time, the adjustment to the heading marker won't change this outcome. Therefore, it is accurate to conclude that the aircraft will not join the selected radial at any point, highlighting the importance of understanding both the heading indicators and the aircraft’s geographical position relative to the navigation aides.