Final answer:
Jaylen should draw arrows pointing outward on the right side of the opening to correctly depict diffraction, an effect where wavefronts bend after passing through an opening, consistent with Huygens's principle.
Step-by-step explanation:
Jaylen can correct the error in his diagram by drawing the arrows on the right side of the opening so they point outward instead of inward. This modification will accurately represent the process known as diffraction, where the edges of a wavefront bend after passing through an opening. According to Huygens's principle, each point on the wavefront can be thought of as the source of a new wave, and as the waves pass through an opening, the waves begin to spread out in semicircular patterns, propagating outward and forming concentric circles on the other side. Hence, the direction of the arrows should illustrate this outward propagation past the boundary.