Figure 5
The reorientation of active particles that cross the interface (\(\textbf{a}\)), (\(\textbf{b}\)), are reflected by the interface (\(\textbf{c}\)), and the critical orientation required for scattering from the interface (\(\textbf{d}\)). Here, the lines with symbols in (\(\textbf{a}\)), (\(\textbf{b}\)), and (\(\textbf{c}\)) represent the previous experiments using wild-type (wt) or short-flagellated (sfl) Chlamydomonas Reinhardtii25 while the dash-dotted lines correspond to the current theory for pullers \(\beta = 2\). Also, the only line in (\(\textbf{d}\)) represents the current theory.
